CHECK LIST OF FISHES 21 



Order G. TECTOSPONDYLI." Tectospondylous sharks 



Suborder SQUALOIDEI. (Sharks without anal fin) 



Family 18. SQUALID^. Dogfishes 



Genus 45. SQUALUS linnseus. 



Squalus (Artedi) Linnseus, Syst. Nat., ed. X, 1758, 233 (includes all sharks; 

 Squalus acanthias Linnaeus made type by subsequent writers, following 

 Rafinesque, 1810). 



Acathorhinus Blainville, Jour. Phys., 1816, 263 (Squalus acanthias Lin- 

 naeus). 



Acanthias Risso, Europ. Merid., Ill, 1826, 131 (Squalus acanthias Linnaeus). 



84. Squalus acanthias Linnaeus. Spiny dogfish; Cod shark; Codfish shark; 



Thornback shark; Picked dogfish; Bone-dog; Dogfish; Skittle-dog. 

 North Atlantic, on both coasts and about Cuba; abundant along shores 



of Northern and Middle States. 

 Squalus acanthias Linnaeus, Syst. Nat., ed. X, 1758, 233, coast of Europe. 

 Acanthias vulgaris Risso, Europ. M6rid., Ill, 1826, 131, Nice. 

 Acanthias americanus Storer, Svnop. N. Amer. Fishes, in Mem. Am. 



Acad., II, 1846, 506, Massachusetts. 



85. Squalus suckleyi (Girard). California dogfish; Dogfish. 



Pacific coast of America, from Santa Barbara to the Aleutian Islands; 



abundant in southeast and middle Alaska, through to Kamchatka. 

 Spinax (Acanthias) suckleyi Girard, Proc. Acad. Nat. Sci. Phila., VII, 



1854, 196, Fort Steilacoom, Wash. 



Genus 46. CENTROSCYMNUS Bocage and Capello. 



Centroscymnus Bocage and Capello, Proc. Zool. Soc. Lond., 1864, 263 

 (C. coelolepis Bocage and Capello). 



86. Centroscymnus coelolepis Bocage and Capello. 



Coast of Portugal and neighboring parts of the Atlantic; Gloucester, 



Mass., and Nova Scotia Banks. 

 Centroscymnus catlolepis Bocage and Capello, Proc. Zool. Soc. Lond., 1864, 



263, Portugal. 



Genus 47. CENTROSCYLLIUM Muller and Henle. 



Centroscyllium Miillcr and Henle, Plagiostomen, 1838, 191 {Spinax fabricii 

 Reinhardt). 



87. Centroscyllium fabricii (Reinhardt). 



Greenland seas; Gloucester and the Nova Scotia Banks. 

 Spinax fabricii Reinhardt, Dansk. Vidensk. Selsk. Forhandl., Ill, 1828, 

 XVI, Greenland. 



Genus 48. ETMOPTERUS Rafinesque. 



Etmopterus Rafinesque, Caratteri, 1810, 14 (Etmopterus aculeatus Ra- 

 finesque = Squalus spinax L.). 



Acanlhidium Lowe, Proc. Zool. Soc. Lond., 1839, 91 (Acanthidium pusillum 

 Lowe, as restricted by Jordan and Evermann, 1896; restricted by 

 Garman, 1912, to A. calcea, a species of Deania Jordan and Snyder). 



88. Etmopterus hillianus (Poey). 



We.st Indies; Cuba; St. Kitts. 



Spinax hillianus Poey, Memorias, II, 1861, 340, Cuba. 



Family 19. SOMNIOSID.£. Sleeper sharks 



Genus 49. SOMNIOSUS LeSueur. 



Somniosus LeSucur, Jour. Acad. Nat. Sci. Phila., I, 1818, 222 {Somniosus 



brevipinna LeHuenr = Squalus microcephalus Bloch and Schneider.) 

 Lsemargus Muller and Henle, Plagiostomen, 1838, 93 (Squalus borealia 



Scoresby =^ Squalus microcephalus Bloch and Schneider). 

 Leiodon Wood, Proc. Bost. Soc. Nat. Hist., II, 1847, 174 (Leiodon echi- 



natum Wood = Squalus microcephalus Bloch and Schneider). 

 Rhinocymnus Gill, Proc. Acad. Nat. Sci. Phila., XVI, 1864, 264 (^Scymnus 



rostratus Risso). 



" We group together under this name those sharks that, like the rays, lack the anal fin and that have 

 also simplified or degenerate vertebrae, in which the hard material is arranged in rings without radiation. 



