42 FISHERIES OF THE UNITED STATES. 



ALOPECIDiE. 



ALOPIAS YULPES, (Linu.) Bou.— Threshee ; SwiNaLE-TAiL.— At-^ 

 lautic and Mediterraueau. 

 15733. Cast. Wood's Holl, Mass. U. S. Fisli Comraissiou. 



SPHYR]\ID^. 



SPHYENA ZYGxENA, (Linn.) Mull. & Heule. — Hammer-head 

 Shark. — Tropical and Subtropical Seas. 



Color sketcli. (Richard.) U. S. Fish Coramissiou. 



EENICEPS TIBUEO, (Linn.) Gill.— Shovel-head Shark.— Atlantic 

 and Western Pacific. 



Color sketch. 



GALEORHIIVIDiE. 



ISOGOMPHODOX MACULIPINXIS, Poey.— Spotted-fin Shark.— 

 Tropical and Subtropical Seas. 



Color sketch. (Richard.) U. S. Fish Commission. 



GALEOCERDO TIGEIXUS, Mull & Henle.— Tiger Shark.— At- 

 lantic ; Indian Ocean. 



Photograph. U. S. Fish Commission. 



MUSTELUS CANIS, (Mitch.) De Kay.— Smooth Dog-Fish.- Cape 

 Cod to Cape Hatteras. 



Photograph. U. S. Fish Commission. 



GII¥GL.Y:?IOSTO:?IATIDiE. 



'GINGLYMOSTOMA CIEEATUM, (Gmel.) M. & H.— NuRSE-SHARK.— 

 Tropical Atlantic. 

 Color sketch. 



SPIIVAClDiE. 



SQUALUS AMEEICANUS, (Storer) Gill.— Spined Dog-fish.— New- 

 foundland to Cai)e Hatteras. 



Photograph. U. S. Fish Commission. 



SCYi^Il^IDiE. 



SOMNIOSUS MICROCEPHALUS, (Bloch.) Gill.— Sleeper SHARK.—, 

 North Atlantic. 



Photograph. U. S. Fish Commission. 



