56 REPORT OF NEW JERSEY STATE MUSEUM. 



Genus Lamna Cuvier. 



The Mackerel Sharks. 

 Lamna cornubica (Gmelin). 



Mackerel Shark. 



A large fierce pelagic shark reaching a length of lo feet. It 

 may be known from the preceding species chiefly by the teeth, 

 which are sharp with entire edges, somewhat triangular and 

 mostly with a small cusp on each side at the base. 



Mackerel Shark. Lamna cornubica (Gmelin). 



A single example from Townsend's Inlet, taken by Capt. J. 

 D. Cassey, of which only the jaws were preserved, has been 

 examined. About Cape May sharks, evidently answering the 

 description of this species, have been reported as of less frequent 

 occurrence than others. One of these was taken by Mr. D. M. 

 Barringer during the summer of 1899 on a 17-ounce rod which 

 was said to have weighed about 260 pounds. It measured 8 feet 

 4 inches in length and when opened contained pieces of butter 

 fish, Trachinotus, menhaden, Brevoortia and two or three crabs. 

 Some years back another was reported from a pound-net with 

 3 remoras attached. It does not appear likely that the accounts 

 of these examples could refer to the Isvirus dekayi. 



? Isuropsis glaucus Abbott, Geol. N. J., 1868, p. 828. 



