FISHERIES, GAME AND FORESTS. 



209 



2. Mustelus canis {Mitchill). Smooth Dogfish. — The species have been 

 brought ahve from Gravesend Bay in August, September and October. In the Aqua- 

 rium it is restless and delicate, often coming to the surface and struggling as if trying 

 to escape from the pool. 



3. Sphyrna zygaena {Liiina:ns). Hammer-headed Shark. — Not common in 

 Gravesend Bay; occasionally taken in August and September, but never brought alive 

 to the Aquarium because of its great liabihty to injuries of the eyes. 



4. Carcharias littoralis {Mitchill). Sand Shark. — A young male received 

 from Gravesend Bay, Long Island, on June 26, 1895, "^'^d in the Aquarium Decem- 

 ber 19, 1895, when the temperature of the water in the pool containing it was 53"- 

 Fahr. The following notes were made upon the specimen in the fresh condition : 



Color, bronze gray with light brown blotches, the argest about as long as the eye. Belly 

 and other lower parts white. Eye yellowish. Tips of pectorals, ventrals, dorsals, anal and 

 caudal above and below with a narrow black streak. Numerous minute dark specks on the 

 under surface of snout and suborbital region, extending back to angle of mouth. 



Two rows of teeth in function above and three below. Length of longest tooth in lower 

 jaw, ^ inch ; in upper jaw, J^ inch. 



Measurements. 



