. Outlines of zoology. Zoology. HOLOCEPHALI. 5'7 body, a continuous dorsal fin, a symmetrical tail, and pectoral fins,'with an arrangement of rays resembling that in the biserial "; Holocephali. The Holocephali are represented by the sea-cat or Chimara from northern seas, and Callorhynclnts from the south. There is a fold or operculum covering the gill-clefts and leaving only one external opening. Fig. 220.—Lateral view of dog-fish [Scyllium catulus). Note ventral mouth with naso-buccal groove, heterocercal tail, and unpaired fins, Gill-slits; pc, pectoral fins; p
. Outlines of zoology. Zoology. HOLOCEPHALI. 5'7 body, a continuous dorsal fin, a symmetrical tail, and pectoral fins,'with an arrangement of rays resembling that in the biserial "; Holocephali. The Holocephali are represented by the sea-cat or Chimara from northern seas, and Callorhynclnts from the south. There is a fold or operculum covering the gill-clefts and leaving only one external opening. Fig. 220.—Lateral view of dog-fish [Scyllium catulus). Note ventral mouth with naso-buccal groove, heterocercal tail, and unpaired fins, Gill-slits; pc, pectoral fins; pv., pelvic fins. on each side; the upper jaw is fused to the cartilaginous skull; the skin is naked; the anus, the Mullerian and urinary ducts, open separately. Otherwise the Holocephali resemble Elasmobranchs, and may be regarded as a sub-order. In some respects, however, in the structure of the skull, they suggest Dipnoi, and in the connection it is interesting to notice that there is an auricular septum in 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 Thomson, J. Arthur (John Arthur), 1861-1933. Edinburgh, Glasgow and London, H. Frowde and Hodder & Stoughton
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Keywords: ., bookauthorth, bookcentury1800, bookdecade1890, booksubjectzoology
