. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. I'll man SCHOOL zoolooy. n Diflroi''.ifc iv«,'i()nH of tlio iKxIy have clifl[cM-(!iifc diitioH to dis- cliurgo, and coiihwjuuntly dill^r iii form and Htnictuio. Wo distiugiiiHh in u iisli the head, trunk, and tail, of which thutii'Ht lodgos the luain and HonHo orgaiiH, Kocuros food, and sholtorH tho gillH, th(5 hiHt is chiefly locomotivo in function, whilo tho trunk didfira from hoth iu being holiowo«l out so as to encIoHe tho in- tostinos and otlior viscera in tho so-caUed body-cavity (coelom). Tlie reg
. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. I'll man SCHOOL zoolooy. n Diflroi''.ifc iv«,'i()nH of tlio iKxIy have clifl[cM-(!iifc diitioH to dis- cliurgo, and coiihwjuuntly dill^r iii form and Htnictuio. Wo distiugiiiHh in u iisli the head, trunk, and tail, of which thutii'Ht lodgos the luain and HonHo orgaiiH, Kocuros food, and sholtorH tho gillH, th(5 hiHt is chiefly locomotivo in function, whilo tho trunk didfira from hoth iu being holiowo«l out so as to encIoHe tho in- tostinos and otlior viscera in tho so-caUed body-cavity (coelom). Tlie regions i*eforred to aio said to bo axial, because they are dispos(Hl round tho chief axis of tho body, whilo tho two pail's of limbs or a[)i)endages, nnich more developed in tho higher Vertebrates, project laterally from the trunk, to v/hich they are attached in the neighbourhood of the cephalic and caudal regions respectively, and are descril)ed as appendicular. In a fish tho anterior and posterior appendag(;s are known as the pectoml and ventral fins, (Fig. 1) from which are to be. Fig. L -Common Catfish, or Bullhead ^. Aminma nebtilosus. distinguished the unpaired fins, occupying the middle line of the doi'^il and ventral aspects of the trunk and tail, and as- sisting in locomotion. The hitter are named from tlieir jK)si- tion doi'sal, caudal and anal. In tho catfish, pai-t of the dor- sal is separated as the adipose fin, which is regarded as tho rudiment of a longer doi-sal, and, instead of being supported by fin-rays, has only fatty tissue within it. 4. Apertures.—Certain apertures exist on the surface of the body; of these, the mouth is bounded by the upper and lower jaws and leads into the mouth-cavity, tho nostrils or ¥. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wright, R. Ramsay (Robert Ram
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
