NICHOLS & .AIUKPHY : LONCt ISLAND SHARKS. 
23 
This shark ranges from the West Indies to Cape Cod, l)ut is nowhere 
common. DeKay records it from the xncinitN* of New York Harbor. One 
of his s])ecimens was taken there in October, 1840, and others have been 
captured in nets in Vine3"ard Sound, Mass., as late as December. It it a 
large, ]iowerful, swift-swimming species. Mackerel and other small 
fishes, conger-eel, and .squids have been found in its stomach. We 
know of no recent Long Lsland records for the mackerel shark. 
15. PORBEAGLE 
/s lints piindatiis ( vStorer ) 
luiiiiiia cor)iHbica (in part), Jordan and Evermann, p. 49. 
Isiirus piiiniafiis. Gannan, p. 36. 
Thi.s species has the first dorsal fin placed only slightly further back than the 
pectorals. It resembles in general the preceding species. Bluish gray above, white 
below. Length 10 feet. 
