A manual of zoologyWilliam Blackwood & Sons, 1878 |
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Side 27
... include the belief that the term necessarily expresses a fixed and permanent quantity . Species , therefore , may be defined as an assemblage of individuals which resemble each other in their essential characters , are able , directly ...
... include the belief that the term necessarily expresses a fixed and permanent quantity . Species , therefore , may be defined as an assemblage of individuals which resemble each other in their essential characters , are able , directly ...
Side 28
... include all those animals which are formed upon the same structural or morphological type , irrespec- tive of the degree to which specialisation of function may be carried . Impossibility of a Linear Classification . - It has sometimes ...
... include all those animals which are formed upon the same structural or morphological type , irrespec- tive of the degree to which specialisation of function may be carried . Impossibility of a Linear Classification . - It has sometimes ...
Side 54
... includes the most lowly organised members of the animal kingdom . From this circumstance it is difficult , if not impossible , to give an exhaustive definition , and the fol- lowing is , perhaps , as exact as the present state of our ...
... includes the most lowly organised members of the animal kingdom . From this circumstance it is difficult , if not impossible , to give an exhaustive definition , and the fol- lowing is , perhaps , as exact as the present state of our ...
Side 73
... include the Polycystina , the Acanthomet- rina , and the Thalassicollida , to which Dr Carpenter adds Actinophrys and its allies , chiefly on account of the form of the pseudopodia , the latter forming a special group , to which the ...
... include the Polycystina , the Acanthomet- rina , and the Thalassicollida , to which Dr Carpenter adds Actinophrys and its allies , chiefly on account of the form of the pseudopodia , the latter forming a special group , to which the ...
Side 82
... include in this group all the Horny Sponges as well . The siliceous Sponges are mostly inhabitants of the deep sea , and many of them are remarkable not only for their ex- treme beauty , but for the great length of the siliceous ...
... include in this group all the Horny Sponges as well . The siliceous Sponges are mostly inhabitants of the deep sea , and many of them are remarkable not only for their ex- treme beauty , but for the great length of the siliceous ...
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Manual of Zoology ...: With a General Introduction on the Principles of Zoology Henry Alleyne Nicholson Ingen forhåndsvisning tilgjengelig - 2015 |
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abdomen adult alimentary canal ambulacral amongst animal Annelides antennæ anus aperture appendages Arachnida articulated attached birds bivalve body bones Brachiopoda branchiæ branchial calcareous carapace cavity cephalothorax chitinous ciliated composed comprising consists contractile Crustacea Ctenophora developed disc distinct division dorsal embryo Eocene external extinct extremity feet females fins fishes Foraminifera fossil furnished gemmation genera genus gills head horny Huxley Hydrozoa incisors Insects integument intestine known labium larva larvæ legs limbs living locomotive males Mammals mandibles margin maxillæ membrane molars Mollusca mouth nervous system operculum organs ovum Owen pairs Paleozoic parasitic placed plates polypide polypites Polyzoa portion possess posterior present regarded reproductive Reptiles resembling respiratory Rotifera rudimentary Scolecida segments shell side Silurian single skeleton sometimes somites species spines stomach structure sub-order surface tail teeth tentacles termed thorax toes transverse tube upper usually valves ventral Vertebrates vesicle whilst wings Zoantharia zooids