46 REPORT OF COMMISSIONERS OF INLAND FISHERIES. 



CARCHARID.E. The Sand Sharks. 



7. Carcharias littoralis (Mitchill). Sand Shark. 



Geog. Dist.: Atlantic coast, Cape Cod to Cape Hatteras. 



Season in R. I.: From May to November it is common, but is less so than 



the dogfish. 

 Food: Fishes, such as flatfish, menhaden, squeteague, butterfish, scup. 



Also crabs and squids. 

 Size: Average 4 J to 5 feet long, largest 12 feet long. 



LAMNID^. The Mackerel Sharks. 



8. Isurus dekayi (Gill). Mackerel Shark. 

 Geog. Dist. : Cape Cod to West Indies. 



Season in R. I.: Said to be more common of late years, but not abundant. 



Rare in Narragansett Bay. 

 Food: Small fishes, squids, mackerel, conger eel. 

 Size : They average 4 or 5 feet, the largest 10 feet, weighing up to 400 pounds- 



9. Lanina cornubica (Gmelin). Blue Shark; Mackerel Shark. 



Geog. Dist.: Newfoundland to West Indies. Common on Massachusetts 



coast during mackerel season. 

 Season in R. I.: Said by the fishermen to be more common than the 



mackerel shark (Isurus dekayi), but this species is probably confused with 



others. 

 Food: Small fishes, especially mackerel. Squids. 

 Size: Ten feet. 



SQUALID^. The Dog-Fishes. 



10. Squalus acanthias (Linnaeus). Dogfish; Spiny Dogfish. 



Geog. Dist.: Atlantic south to Cuba and from the North Cape to the Medi- 

 terranean. 



Migrations : Probably moves northward in spring a little after the mackerel, 

 returning from September to November. 



Season in R. L: The last of April or first of May to November. Rare in 

 the Bay, but so common outside as to be a nuisance to the fishermen. 

 Follows the schools of scup in spring. 



