662 GEOLOGIc!a.L SURVEY OF NEW JERSEY. 



tating membrane; spiracles behind and near eye; first dorsal fin 

 large ; tail fin as long as body, with a pit at its root and a notch 

 near tip. 



ALOPI4.S, Raf. 



(Squalus. Alopecias.) 



A. vulpes, Gmel. Thresher. Fox Shark. Swingle-tail. Long-tail 

 Sharks, &c. 



For characteristics, see family characters. 

 " This is a common species, frequently taken on hooks baited 

 for other fish." 



Family ODONTASPIDiE. 



Sand Sharks. 



Mouth wide ; teeth large, long and narrow ; gill openings all in 

 front of pectorals ; dorsal fins nearly equal ; pectorals short ; no nicti- 

 tating membrane ; spiracles pore-like. 



ODONTASPIS, Ag. 



(Oaroharias.) 



O. littoralis, Mitch, (aniericanus.) Sand Shark. Shovel-nose. 



Teeth awl-like ; no basal cusps on first and fourth upper teeth 

 and first lower ; body elongate ; head pointed ; fins small ; color 

 gray. Length, 4 to 6 feet. Voracious. 



" This species, described in full by the author, was taken off 

 Beesley's Point."— [C. C. A.J * 



Family LAMNID^. 



The Porbeagles. 



Size large; body stout; mouth wide; teeth large; lobes of tail fin 

 nearly equal; first dorsal and pectorals large; second dorsal and 

 anal very small ; spiracles minute br absent ; gill openings wide and 

 lateral. 



