The Study of Animal LifeScribner, 1892 - 375 pages |
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Page 7
... cilia ; to see it gliding through the emerald stems , hunting for its food , snatching at its prey , fleeing from its enemy , chasing its mate ( the fiercest of our passions blazing in an invisible speck ) ; to see it whirling in a mad ...
... cilia ; to see it gliding through the emerald stems , hunting for its food , snatching at its prey , fleeing from its enemy , chasing its mate ( the fiercest of our passions blazing in an invisible speck ) ; to see it whirling in a mad ...
Page 212
... cilia from which flagella differ only in detail , we may speak of the type as ciliated ; the self - contained Gre- garines , often wrapped up within a sheath , we may call predominantly encysted ; while those forms which are inter ...
... cilia from which flagella differ only in detail , we may speak of the type as ciliated ; the self - contained Gre- garines , often wrapped up within a sheath , we may call predominantly encysted ; while those forms which are inter ...
Page 215
... cilia which work like flexible oars ; the parasitic Gregarines without any definite locomotor structures sometimes writhe sluggishly . A few Infusorians have a spasmodic leaping or springing motion , while the activity of others ( like ...
... cilia which work like flexible oars ; the parasitic Gregarines without any definite locomotor structures sometimes writhe sluggishly . A few Infusorians have a spasmodic leaping or springing motion , while the activity of others ( like ...
Page 222
... ciliated cells . These ciliated cells , on which the whole life of the sponge depends , line the canals , but are especially developed in little clusters or ciliated chambers . The currents are drawn in through very small pores all over ...
... ciliated cells . These ciliated cells , on which the whole life of the sponge depends , line the canals , but are especially developed in little clusters or ciliated chambers . The currents are drawn in through very small pores all over ...
Page 223
... cilia . But we must search an inland pool to find one of the very simplest members of this class - the freshwater Hydra which hangs from the floating duckweed and other plants . This Hydra is a tubular animal often about quarter of CHAP ...
... cilia . But we must search an inland pool to find one of the very simplest members of this class - the freshwater Hydra which hangs from the floating duckweed and other plants . This Hydra is a tubular animal often about quarter of CHAP ...
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Common terms and phrases
action activity adult Amphibians ants backboned become begin Biology birds bivalves body brain called carbonic carbonic acid Chambers's Encyclop changes characteristic ciliated colony colour complex corals crab creatures crustaceans cuttlefish Darwin division of labour earth Echinoderms egg-cell eggs embryo Encyclopædia Encyclopædia Britannica energy Erasmus Darwin evolution Evolution of Sex fact female fertilised fishes food-canal freshwater frog function grow habit Haeckel heredity higher animals hydroid individual influence Infusorians insects instincts jellyfish kinds lancelet larvæ less living matter Lond male mammals medusoids molluscs Natural History natural selection naturalists nervous nest notochord observed offspring organism origin ovum parasites parents plants Prof progress Protists protoplasm Protozoa recognise regard reproductive cells reptiles result sea-anemones seems shells simplest animals skin sometimes species spermatozoa spiders sponges strange structure struggle for existence substances suggest surroundings theory tion tissues units variations Vertebrate worms young Zoea zoology
Popular passages
Page 339 - THERE was a child went forth every day, And the first object he look'd upon, that object he became, And that object became part of him for the day or a certain part of the day, Or for many years or stretching cycles of years.
Page 174 - I believe a leaf of grass is no less than the journey-work of the stars, And the pismire is equally perfect, and a grain of sand, and the egg of the wren, And the tree-toad is a...
Page 297 - Doing this, and making the requisite addition, the formula finally stands thus :—Evolution is an integration of matter and concomitant dissipation of motion; during which the matter passes from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity ; and during which the retained motion undergoes a parallel transformation.
Page 44 - When we reflect on this struggle, we may console ourselves with the full belief, that the war of nature is not incessant, that no fear is felt, that death is generally prompt, and that the vigorous, the healthy, and the happy survive and multiply.
Page 262 - It scarcely breathes with its one lung (the other shrivelled and abortive) ; it is passive to the sun and shade, and is cold or hot like a stone ; yet " it can outclimb the monkey, outswim the fish, outleap the zebra, outwrestle the athlete, and crush the tiger.
Page 289 - Fifthly, from their first rudiment, or primordium, to the termination of their lives, all animals undergo perpetual transformations, which are in part produced by their own exertions in consequence of their desires and aversions, of their pleasures and pains, or of irritations, or of associations; and many of these acquired forms or propensities are transmitted to their posterity.
Page 33 - I should premise that I use the term Struggle for Existence in a large and metaphorical sense, including dependence of one being on another, and including (which is more important) not only the life of the individual, but success in leaving progeny.
Page 24 - It may be doubted whether there are many other animals which have played so important a part in the history of the world, as have these lowly organized creatures.
Page 23 - Earth-worms, though in appearance a small and despicable link in the chain of Nature, yet, if lost, would make a lamentable chasm.
Page 289 - As air and water are supplied to animals in sufficient profusion, the three great objects of desire, which have changed the forms of many animals by their exertions to gratify them, are those of lust, hunger and security.