16 Sharks 



BASKING, TIGER, MACKEREL, WHITE, 

 OTHER SHARKS 



I. Lateral keel or ridge on caudal peduncle 

 Page 17, figs. A, C 



la. Gill slits very long; extend almost full height of 

 head and onto lower surface of head 

 Page 17, figs. A, B 



See Basking Shark, p. 235. 



lb. Gill slits shorter; do not extend full height of head 

 or onto lower surface of head 

 Page 17, fig. C 



See Tiger, Mackerel, White Sharks, p. 34. 



II. No lateral keel or ridge on caudal peduncle 

 Page 17, fig. D 



See False Cat, Whale, Other Sharks, p. 18. 



