Lectures on the comparative anatomy and physiology of the invertebrate animalsLongman, Brown, Green & Longmans, 1855 - 689 pages |
Common terms and phrases
abdominal Acalephæ alimentary canal analogous anellids animalcules antennæ Anthozoa aperture appendages Ascaris attached body Bothriocephalus branchial Bryozoa calcareous cells Cestoidea character ciliated colour compound consists contractile corpuscles Crustacea cyst Cysticercus cysticle Dalyell developed digestive cavity disc distinct dorsal eggs Ehrenberg elongated embryo Entozoa external extremity female fibres filaments fluid ganglion gelatinous gemmation Genera genus germ-cells germ-mass germinal vesicle germs granular head Hydra Hydrozoa impregnated individuals Infusoria integument intestine joints larva larvæ length locomotive longitudinal male margin Medusa membrane metamorphoses minute mouth muscles muscular nerves nervous system nucleus observed organisation organs orifice ovaria ovarium ovicapsules oviduct oviparous ovum pair parasitic parietes plants Polygastria polypes present radiated ramified reef Rotifer Rotifera segments shell side Siebold slender sometimes species spermatozoa spines spontaneous fission stomach suckers surface Tania tapeworm tentacles tentacula terminal testis tion tissue transverse Trematoda tube tubular ventral vessels vibratile cilia Vorticella worm yolk
Popular passages
Page 191 - O'er bog or steep, through strait, rough, dense, or rare, With head, hands, wings, or feet, pursues his way, And swims, or sinks, or wades, or creeps, or flies.
Page 16 - ... matter upon the earth. For when this matter is dissolved or suspended in water, in that state of comminution and decay which immediately precedes its final decomposition into the elementary gases, and its consequent return from the organic...
Page 156 - Regarding light itself also, we learn, from the resemblance of these most ancient organizations to existing eyes, that the mutual relations of light to the eye, and of the eye to light, were the same at the time when crustaceans endowed with the faculty of vision were first placed at the bottom of the primeval seas, as at the present moment.
Page 51 - Jig. 72,) is situated on the ventral surface of the body at the junction of the anterior and middle thirds of the body, which is generally marked at that part by a slight constriction.
Page 327 - All animals resemble each other at the earliest period of their development, which commences with the manifestation of the assimilative and fissiparous properties of the polygastric animalcule : the potential germ of the Mammal can be compared, in form and vital actions with the Monad alone, and, at this period, unity of organisation may be predicated of the two extremes of the Animal Kingdom.
Page 205 - I have described the process for its better intelligibility in the Aphides as one of a simple succession of single individuals, but it is much more marvellous in nature. The first-formed larva of early spring procreates not one but eight larvae like itself in successive broods, and each of these...
Page 351 - Complete in 132 vols. fcp. 8vo. with Vignette Titles, price, in cloth, Nineteen Guineas.
Page 17 - ... in water, in that state of comminution and decay which immediately precedes its final decomposition into the elementary gases, and its consequent return from the organic to the inorganic world, these wakeful members of nature's invisible police are everywhere ready to arrest the fugitive organised particles, and turn them back into the ascending stream of animal life.
Page 327 - ... the creation, being at no stage different from some of those inferior orders; or, in other words, if we were to take a series of animals, from the more imperfect to the perfect, we should probably find an imperfect animal corresponding...
Page 24 - ... fastened at each end an apparatus which chemists employ for collecting carbonic acid; that to the left was filled with concentrated sulphuric acid, and the other with a solution of potash. By means of the boiling heat every thing living, and all germs in the flask or in the tubes, were destroyed, and all access was cut off by the sulphuric acid on the one side, and by the potash on the other.