The Shipley Collection of Scientific Papers, Volume 1371909 |
Common terms and phrases
acid alga Amer animal pole Annelids Anoplodium appear Arenicola Atrium Autolytus band body budding canal capsule centrifugal Chatopterus chitinous chromatin chromosomes cilia cirri Claparède cleavage colourless containing Convoluta cytoplasm described differentiation division dorsal cirrus duct earthworm Ebbestrand ectoplasm endoplasm Epithel epitokal fache Vergrößerung female fertilized Fundort genus germinal vesicle glands Graff granules gray cap green cells infecting Jour larva larvæ lateral layer longitudinal MALAQUIN male mass maturation spindle microsomes muscular nephridia nephridium nitrogen nuclear nucleus number of segments observed organism original ovum pair Palolo parapodia parapodium Pharynx pigment polar lobe Polychaet posterior present prostomium protoplasm prototroch Puerto Reactions region reproduction residual substance sea-water setæ sexual somites species specimens sperm spermatozoa spherules stage stain stolon surface swimming setae Syllids Tafeln Teil tentacles tion trochophore Trypanosyllis Ultima Esperanza unsegmented eggs vacuoles ventral Zellen Zool Zoologie
Popular passages
Page 64 - For, to say nothing of half the birds, and some quadrupeds which are almost entirely supported by them, worms seem to be the great promoters of vegetation, which would proceed but lamely without them, by boring, perforating, and loosening the soil, and rendering it pervious to rains and the fibres of plants, by drawing straws and stalks of leaves and twigs into it; and, most of all, by throwing up such infinite numbers of lumps of earth called wormcasts, which, being their excrement, is a fine manure...
Page 64 - ... by drawing straws and stalks of leaves and twigs into it; and, most of "all, by throwing up such infinite numbers of lumps of earth called " worm-casts, which, being their excrement, is a fine manure for grain "and grass... the earth without worms would soon become cold, hard" bound, and void of fermentation, and consequently sterile.
Page 17 - OF THE MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD COLLEGE. There have been published of the BULLETIN Vols. I. to LII.; of the MEMOIRS, Vols.
Page 312 - Fauna Arctica. Eine Zusammenstellung der arktischen Tierformen, mit besonderer Berücksichtigung des Spitzbergen-Gebietes auf Grund der Ergebnisse der Deutschen Expedition in das Nördliche Eismeer im Jahre 1898.
Page 279 - MORGULIS TWO FIGURES In presenting these observations upon the movements of earthworms and the conclusions to which the results of specially arranged experiments have led me, I shall deal with two distinct problems. The one is, whether the earthworm in locomotion reacts as a succession of separate segments or as a unit-organism ; the other is, what determines the worm's movement in a definite direction? Strange as it may seem at first glance, a definite solution of the first problem depends to some...
Page 205 - It is not only able to utilise for jts metabolism such organic nitrogen compounds as urea and uric acid, but thrives better in such solutions than in the presence of nitrates only. It is capable of a saprophytic as well as of a holophytic mode of life, and under the former conditions exists in both colourless and green forms. The association of this plastic infecting organism with Convoluta roscoffensis is traced by the authors to its hunger for organic nitrogen, such as is afforded by the egg-capsules...
Page 534 - GP 1905. Report on the Copepoda of the Atlantic slope off counties Mayo and Galway.
Page 2 - JB 1847. An account of palolo, a sea worm eaten in the Navigator Islands, with a description by JE Gray.
Page 566 - Dendrobcena octaedra, which, contrary to expectation, I have not yet detected here. Friend has recorded it from England and Paisley, Southern finds it commonly in the north of Ireland, and abroad its range extends from Portugal to Norway, Iceland, etc., so it should surely occur in some part of our area.1 In the choice of habitat Oligochaetes, in common with other creatures, have their likes and dislikes. " I have seen," writes Darwin in his book on "Vegetable Mould and Earthworms" (1881 ed., p....
Page 534 - FARRAN, GP— Record of the Copepoda taken on the Mackerel Fishing Grounds off Cleggan, Co. Galway, in 1901, pp. 18, pi. 2.