Clitellio arenarius resides in places similar to Sanuris lineata, and is equally common. When thrown into fresh water it is evidently pained, and soon dies. Cuvier has placed it in a section of his genus Nais (Reg. Anim. iii. p. 212), but the propriety of this collocation may be doubted; and it will be better to retain the Müllerian name until the allied species, several of which have not yet been described by any one, are better known. The spinules are very short, not half the diameter of the body, and apparently entirely retractile; they are colourless, curved like an italic, and resemble those of the common earthworm, being proportionably stout. There are two only in the feet of the few anterior segments, and three or four where most developed. Valla ciliata (page 68). Hab. "It lurks constantly in the sand of the shore at about half tide, whence the head is protruded, waving to and fro.”—Dalyell. This worm is found under stones, between tide-marks, in a wet sand mixed with a little clay. It often lies fully extended, and it moves forwards and backwards with equal ease*. When crawling it can return upon itself, when the reverted anterior half lies parallel with the posterior, and the two extremities move in opposite directions. It is very contractile, and frequently collects a portion of the body into partial knots or swellings, and will again extend itself to a great length, until it becomes as slender as sewing-thread. Its red colour is very generally diffused, and to the naked eye no vessels are visible; but when placed under the magnifier and carefully observed, the blood may be seen propelled to and fro through vessels, one of which runs along each side of the intestine. The blood is grumous, and nothing can be more irregular than its course, now driven in one direction, then in the opposite, and then again settling at rest; for its motion seems to be dependent on the motions of the body and the extension of the rings. The intestine is, as usual, large, and deeply constricted at every joint; it is usually filled with earthy matter, and, when this is pressed out, it still appears dusky, and somewhat reticulated in a very minute manner. I have never seen any specimens with a belt, such as we see in the common earthworm. The number of tufts of bristles is hard to be correctly ascertained, but there appear to be four on each segment; and towards the middle and posterior part of the body they issue from a very evident cordate or roundish tubercle, which is not obvious on the anterior segments. Müller says that his Lumbricus ciliatus is only 9 lines in length, but he had never seen a living specimen. It was sent to him from the shores of Norway. * "In crawling, the segments enlarged at the place of their union; and it is a peculiar feature, that a kind of intumescence appeared at intervals as the body advanced, the portion thus enlarged being vivid red, while the vicinity became pale, and this intumescence was transmitted along the body."-Dalyell. Fam. III. NAIDES (page 69). The Naides have been recently (1837) raised to the rank of a separate class, under the name Somatotoma: see Ann. des Sc. nat. vii. p. 101 (1847). Schmidt considers this a right proceeding: see his interesting "Observations sur l'anatomie et la physiologie des Naïdes," in Ann. des Sc. nat. vii. p. 189. Nais scotica (page 71). Body transparent, the anterior portion cylindrical, rounded and obtuse at the end. Bristles shorter than the diameter of the body, more than one in the place of insertion. "In some a yellow globule is seen towards the anterior, and in one or two, white spherules have appeared. "The food may be the minute Entomostraca, as a specimen of the Cypris appeared in the intestine. This last organ is of variable form, being divided into several sacs, of alterable appearance and numbers. "The transparence of the animal completely exposes the internal conformation. "It dwells among the roots of the Iris and Equisetum, not very far from the surface of lakes and ponds."-Dalyell. It resembles Nais elinguis of Müller, but in this the bristle is solitary, or there is one only from the same point; and N. scotica differs from N. barbata in the form of the head, in the absence of eyes, and in the bristles, which in N. barbata exceed the diameter of the body. SUPPLEMENT, CONTAINING ADDENDA AND CORRIGENDA AND ADDITIONAL SPECIES. Page 16, after Convoluta paradoxa add Plate I. fig. 2, a, b. Page 19, after Astemma rufifrons add Plate II. b. figs. 4, 5. Fig. 4, natural size; fig. 5, portion of anterior extremity, magnified. Page 19, after Astemma filiformis add Plate I. fig. 1, a, b. Page 20, after Tetrastemma varicolor add Plate II. a. fig. 4, nat. size. Page 21, after Borlasia olivacea add Plate II. b. figs. 1, 1*, 1**. Fig. 1, 1, 1, nat. size; 1*, anterior and middle parts, magnified ; 1**, embryo? Page 21, after Borlasia octoculata add Plate II. b. figs. 2, 2*. Fig. 2, nat. size; 2*, anterior portion, magnified. Page 21, after Borlasia purpurea add Plate II. b. figs. 3, 3*. Fig. 3, nat. size; 3*, head, portion of middle, and tail, magnified. Page 22, after Omatoplea gracilis add Plate II. a. figs. 1, 1*. Fig. 1, nat. size; 1, anterior portion, magnified. Page 23, after Omatoplea rosea add Plate II. a. figs. 2, 2*, 2**, 3, 3*. Fig. 2, nat. size, both figures; 2*, anterior portion, magnified; 2**, caudal extremity, magnified; fig. 3, 0. rosea, var. brunnea, nat. size; 3*, head, magnified. Page 23, after Omatoplea melanocephala add Plate II. a. figs. 5, 5*. Fig. 5, nat. size; 5*, magnified. Page 24, after Omatoplea pulchra add Plate II. a. figs. 6, 6*. Fig. 6, nat. size; 6*, magnified. Page 26, Lineus murenoides, after Description, for Length 3-6′′ read 3-6'; and for thickness 2" read 2"". Delete Plate I., and after (e) Falmouth, W. P. Cocks, add (f) Polperro, Cornwall, Laughrin. Page 27, Lineus fasciatus, delete Plate II., and after (c) Falmouth add (d) Polperro, Cornwall, Laughrin. Page 27, Lineus viridis, after (a) Falmouth, W. P. Cocks, add (b, c) Polperro, Cornwall, Laughrin. Page 27, Lineus albus, add (a, b, c) Polperro, Cornwall, Laughrin. Page 28, Meckeha annulata, after (d) Berwick Bay, Dr. Johnston, add (e) Montrose, W. Beattie. Page 29, after Serpentaria fusca add Sp. 3. Serpentaria Beattiei. Lineus Beattiæi, Gray, Proc. Zool. Soc. 1857, 210. t. 48. In length this worm was from 18 to 20 inches, and had the faculty of dividing itself into numerous pieces. The upper portion, containing the head, was the only part preserved and sent to the British Museum by Mr. Beattie of Montrose. As Dr. Gray observes, "the specimen is in far too imperfect a condition to describe, but I think it may be provisionally named Lineus Beattiai, after its discoverer." The fragments, in spirits, are of a dull greyish-white colour, and the head exhibits "a large longitudinal mouth, opening into a longitudinal cavity, which extends the whole of its length, having a central, broad, longitudinal rounded ridge extending the whole length of the dorsal surface." Query-May it not be synonymous with Serpentaria fragilis, Goodsir? Page 32, after Entobdella hippoglossi add Plate XII. figs. 1-3. Page 33, after description of Capsala Rudolphiana add (a) From the gills of the Orthagoriscus mola, Co. Galway, Capt. Bedford, R.N. Page 40, Pontobdella muricata, after (k) Weymouth, W. Thompson, add (1) From a Skate, London market, Mr. Olliffe; (m) Donegal, Ireland, Earl of Enniskillen. Page 42, after Pontobdella littoralis add Plate I. figs. 4-6. Page 43, Piscicola geometra, after Obs. add (a) On the Trout, River Wandle, J. Gould. Page 45, Nephelis octoculata, after (a) The Whiteadder, Berwickshire, Dr. Johnston, add (b) Holy Island, Dr. Johnston. Page 51, Glossiphonia verrucata, after (a) Cobham, Surrey, add (b) Eton, Dr. J. Goodall. Page 52, Glossiphonia sexoculata, after (a) The Whiteadder, Berwickshire, Dr. Johnston, add (b) Holy-Island Loch, Dr. Johnston. Page 53, sp. 7, for G. flava read G. marginata, and add as syno nyms― Hirudo marginata, Müller, Hist. Verm. i. 2. 46. Schrank, Fauna Boica, iii. 2. 162. Baer, Nov. Act. Acad. Cæs. Nat. Cur. xiii. 2. 727. tab. xxxii. f. 10. Hirudo variegata, Braun, System. Beschr. einig. Egelart. 61. tab. vii. f. 1-6. Hirudo cephalota, Carena, Mem. dell' Accad. di Torino, xxv. 298-316. tab. xii. f. 12-19, et tab. xxviii. f. 336. Hirudo oscillatoria, Saint-Amans, Mém. Soc. Linn. de Paris, iii. 193. tab. viii. Piscicola marginata, Moquin-Tandon, Monogr. des Hirudin. 132. tab. vii. f. 2. Piscicola tessellata, Moquin-Tandon, l. c. 133. tab. vii. f. 3 (exclus. Hirudo (Glossobdella) cephalota, Blainville, Dict. Sc. Nat. xlvii. 266. Clepsine marginata, Müller, Wiegmann's Archiv, 1844, 371-376 (et Glossiphonia marginata, Moquin-Tandon, Monogr. des Hirudin. nouv. édit. 375–379. tab. xiv. f. 10–20. Houghton, Ann. & Mag. Nat. Hist. 3rd ser. v. 1860, p. 248. tab. xvi. C. f. 1 & 2. Hirudo flava, Dalyell, ut citat. After Hab. add Bala Lake, and brook near Solihull, Warwickshire, Rev. W. Houghton. Page 59, Lumbricus terrestris, after (c) Berwick Bay, Dr. Johnston, add (d) Kingston-on-Thames, Dr. A. Günther. Page 69, Proto digitata, in synon. after P. digitata, Oersted, add Houghton, Ann. & Mag. Nat. Hist. 3rd ser. vi. 1860, 393. figs. 1, 2 (woodcut). After Hab. add Malvern Park, Solihull, Warwickshire, Rev. W. Houghton. Page 104, Aphrodita aculeata, after (c) Berwick Bay, Dr. Johnston, add (d) Brighton, R. Hudson; (e) Lincolnshire, Maughan; (f) No locality, J. W. Lubbock; (g) Brighton; (h) Hastings; (i) Sandgate, Kent, Mus. Leach; (j) Sandgate, Kent, Rev. Ger. Smith; (k) Firth of Forth, Mus. Leach; (1) Weymouth, Damon. Page 107, Aphrodita hystrix, after (a) The English Channel, Joshua Alder, add (b) Falmouth, J. Cranch; (c) Weymouth, Dr. Bowerbank; (d) Weymouth, Damon. Page 109, Lepidonotus squamatus, for Plate VII. read Plate VIII. : and Page 111, after (f) Aberystwith, J. Henslow, add (g) Leith, Dr. Macdonald; (h) Polperro, Cornwall, Laughrin; (i, j) British coast, Zool. Soc. Coll. |