A treatise on zoology . rsal view. A clotted small first radial articulating l*- indicates the lateral line according to Collinge. -, ° «.ft, anterior nostril;/r, frontal; j, junction of post- Wlth the shoulder - girdle ; orbital, occipital, and trunk branches of lateral-line tliis sninp renreseiits n much system; op, opercular; pa, parietal; , posterior lllis spme Itpiesenis a mucu nostril; poc, postoccipital; , prefrontal; ys<, post- enlarged pair of lepidotrichia temporal; ptf, postfrontal; pto, pterotic; r, rostral 1 • T , 1 • • . 1 1 plates ; so, supraorbital; soc, siiijraoccini
A treatise on zoology . rsal view. A clotted small first radial articulating l*- indicates the lateral line according to Collinge. -, ° «.ft, anterior nostril;/r, frontal; j, junction of post- Wlth the shoulder - girdle ; orbital, occipital, and trunk branches of lateral-line tliis sninp renreseiits n much system; op, opercular; pa, parietal; , posterior lllis spme Itpiesenis a mucu nostril; poc, postoccipital; , prefrontal; ys<, post- enlarged pair of lepidotrichia temporal; ptf, postfrontal; pto, pterotic; r, rostral 1 • T , 1 • • . 1 1 plates ; so, supraorbital; soc, siiijraoccinital; sii, in which the joints have been spiracle; s«, supratemporal. obliterated. No ganoine is found on the exoskeleton ; it is merely replaced by layers of bone, ofwhich the scales and plates are entirely composed. The internal organsare of generalised character (p. 309). The air-bladder is simple (p. 223).Acipenser, L. (Fig. 299) ; freshwater and marine, Europe, Asia, and ; Lower Eocene, BELONG RH YNCHIDAE ScapMrhy7ichus, Meckel (Fig. 300) ; rivers of X. America and Central Asia.
Size: 1062px × 2354px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
