SHARK-LIKE DERMAL DENTICLES. 



r I ' 



C 



D 



E 



Figs. 93 A-F.— Dermal denticles of Callorhynchus. 



The 



dorsal 

 The 



A. Dorsal aspect o( young Callorhynchus "anlarcdcus" (Chili), measuring 16 cm. in length 

 denticles are conspicuous ; iheii disposition and numher is indicated. 



B. Dorsal aspect ot well-grown Callorhynchus " antarcticus" (Chili), measuring 50 cm. in length 

 dorsal denticles are reduced. In a specimen (Austrahan) measuring 92 cm. they do not appear. 



C. Isolated denticle (rom the back of a late " emhryo." ■ 42. After Schauinsland. 

 D Isolated denticle of a lale "embryo" (shown hom side). 42. After Schaumsland. „. . , , 



E. Row of four denticles from the back (in front o( second dorsal fin) of a lale "embryo.' After Schaumsland, 



F. Enlarged denticle hom similar situation in "adult • specimen. ■ 21. After Schaumsland. 



