[123 J FISHERIES OF THE UNITED STATES. 509 



RAIIBM. 



164. Rata eriatacea Mitchill. Clear-nosed Skate. 



Photograph. 



165. Rata laevis Mitchill. Barn-door Skate; Sharp-nosed 



Skate. 



Photograph. 



SQUATINID^. 



166. Squatina dumerilii LeS. Monk-fish. 



Cast. 

 Photograph. 



LAMNID.E. 



167. Lamna cornubica (Gmel.) Fleming. Mackerel Shark. 



Cast. 



CARCHARILILE. 



168. Carcharias americamis (Mitch.) Jor. & Gilb. Sand 



Shark. 



Cast. 



ALOPIID^E. 



169. Alopias vulpes (Gmel.) Bon. Thresher Shark. 



Cast. 



SPHYKNIIXffi. 



170. Reniceps tibiiro (L.) Gill. Shovel-head Shark. 



Cast. 



171. Sphyrna zygaena (L.) Miill. & Henle. Hammer-head 



Shark. 



Cast. 

 Photograph. 



GALEORHINID^. 



173. Isogomphodoia limbatus (Miill. & Henle) Gill. Spot- 

 ted-fin Shark. 



Photograph. 



173. Galeocerd© tigrinus Miill. & Henle. Tiger Shark. 



Photograph. 



174. Mustelus canis (Mitch.) DeKay. Smooth Dog-fish. 



Cast. 

 Photograph. 



