CHECK-LIST OF NORTH AMERICAN FISHES. 217 



Genus 26, HYPOPEION Mviller & Henle. 

 Hypoprion Miiller & Henle, Plagiostomen, 34, 1838 (macloti). 



55. Hypoprion brevirostris Poey. 



West Indies, north to Charleston, South Carolina. 



Hypoprion brevirostris Poey, Repertorio, ii, 451, tab. 4, 1868, Cuba. 



56. Hypoprion signatus Poey. 



Cnba. 



Hypoprion signatus Poey, Synopsis, 452, 1868, Cuba. 



Genus 27. APRIONODON Gill. 

 Aprionodon Gill, Ann. Lye. Nat. Hist. N. Y., vii, 1861,411 (punctatua =z isodon) . 



57. Aprionodon isodon (Miiller & TTenle). 



Atlantic Ocean. 



Carcharias isodon Miiller & Henle, Plagiostomen, 32, 1838, New York. 



Genus 28. SCOLIODON Miiller & Henle. 



5coM(«ion Miiller & Henle, Wiegmaun'sArchiv f. Naturg., i, 398, 1837 (laticaudua). 



58. Scoliodon longurio (Jordan & Gilbert). 



Pacific Coast of Mexico. 



Carcharias longurio Jordan & Gilbert, Proc. U. S. Nat. Mus. 1882, 106, Mazatlan. 



59. Scoliodon terrge-novae (Richardson). Sharp-nosed Shark; Tiger Shark. 



Cape Cod to Brazil ; very common southward along the Atlantic Coast. 

 Squalus (Carcharias) terroe-novw Richardson, Fauna Bor.-Amer., iii, 289, 1836, 

 Newfoundland. 



Family XII. SPHYRNID^. The Hammer-headed Sharks. 



Genus 29. SPHYRNA Rafinesque. 



Sphyrna Rafinesque, Indice d'lttiol. Siciliana, 60, 1810 {zygoina). 



Subgenus REXICEPS Gill. 

 lieniceps Gill, Ann. Lye. Nat. Hist. N. Y., viii, 1861, 412 (tiburo). 



60. Sphyrna tiburo (Linnaeus). Shovel-head Shark; Bonnet-head. 



Atlantic Ocean; abundant on our coast from Long Island southward, ranging 



to China and Mazatlan. 

 Squalus tiburo Linna»-us, Syst. Nat., ed. x, 234, 1758, America. 



Subgenus PLATTSQUALDS Swainson. 



Platysqualus Swainson, Class. Anim., ii, 318, 1839 (" iihiiro" :=tud€$). 



61. Sphyrna tudes (Cnvier). 



Gulf of California, West Indies, Mediterranean, and Indian Ocean. 

 Zygcena tudes Cuvier, in Valenciennes, M6m. Mus., ix, 225, 1822, Nice; after 

 PantouJIier of Risso. 



Subgenus SPHYRNA Rafinesque. 



62. Sphyrna zygaena (Linnicus). Hammer-headed Shark. 



From Cape Cod and Point Conception southward. 



Squalus zygana Linnseus, Syst. Nat., ed. x, 234, 1758, Europe; America. 



Family XIII. ALOPIID^. The Thresher Sharks. 



Genus 30. AIOPIAS Rafinesque. 

 J/o^JiasRafiuesque, Caratteri diAlcuni Generi, etc., 12, 1810 {maerurus^^vulpea). 



63. Alopias vulpea (Graelin). Thresher; Fox Shark; Swingle-tail; Long-tail Shark. 



Mediterranean and Atlantic; Pacific Coast. 



Squalus vulpea Gmelin, Syst. Nat., i, 1496, 1788, Mediterranean; after Pennant. 



