COPEIA 73 



It had a considerably smaller dorsal than female 

 C. milberti, proportionately longer lower caudal lobe, 

 and the second dorsal was noticeably more advanced 

 than the anal in position. The head was strikingly 

 blunter and more rounded than in female C. milberti, 

 as well as the fish being of heavier build. The jaws 

 and teeth are much larger than those of female C. 

 milberti. 



Mr. Thorne had made the following measure- 

 ments of this male shark, made along the curve (ex- 

 cept total length). Total length 8 ft. 1 in.; head and 

 body along the back, 6 ft. 1 in. ; dorsal fin, from snout, 

 2 ft. 6 in. ; dorsal from base of tail, 2 ft. 9V2 in. ; 

 length of front of dorsal, 1 ft. 2 l{ i in.; top of caudal, 

 2 ft. IY2 in.; front of pectoral fin, 1 ft. 9 in.; pectoral, 

 from snout, 2 ft. ; ventrals from snout, 4 ft. 1 in. ; 

 circumference at root of tail, 1 ft. IV2 in.; at front of 

 dorsal, 4 ft. 4V8 in.; at eye, 2 ft. 5 in.; eye to snout, 

 SVa in.; mouth to snout, 6 in. 



On August 29, 1916, a male C. milberti was taken 

 of which Mr. Thorne made the following correspond- 

 ing measurements: Total length, 6 ft. 6 in.; head 

 and body, along the back, 5 ft. 2 in. ; dorsal fin, from 

 snout, 2 ft. ; dorsal from base of tail, 2 ft. 5 in. ; length 

 of front of dorsal, 1 ft. 1 in. ; top of caudal, 1 ft. 7 

 in.; front of pectoral fin, 1 ft. 0V2 in.; pectoral, from 

 snout, 1 ft. iVi in.; ventrals from snout, 3 ft. 6 in.; 

 circumference at root of tail, 9V2 in.; at front of dor- 

 sal, 2 ft. 8 in. ; at eye, 1 ft. 8 in. ; eye to snout, 6V2 in. ; 

 mouth to snout, 5 in.; weight, 121 lbs. Mr. Thorne 

 further informs me that this fish resembled the fe- 

 males of C. milberti, except that it seemed slightly 

 lighter in color, and differed from the males of C. 

 obseurus. Its eyes were pale yellowish in color like 

 female C. milberti and like a male C. limbatus which 

 he has taken, whereas the eyes of males of C. obseurus 

 are dark brown. 



J. T. Nichols, 

 New York, N. Y. 



