CHECK-LIST OF NORTH AMERICAN FISHES. 219 



Order P. CYCLOSPONDITLI. The Cyclospondylous Sharks. 



Suborder CYCLOSPONDYLI. 



Family XVIII. SQUALIDiE. The Dogfishes. 



Genus 37. SQUALXJS (Artedi) Linnaeus. 

 SquaJioi (^ Artedi) Liniiixsus, Syst. Nat., ed. x, 233, 1758 (includes all sharks). 



71. Squalus acanthias Linn.'ens. Dogfish; Picked Dogfish; Bonedo<j; Skittle-dog. 



North Atlantic on both coasts and about Cuba. 



Squalus acanthias Linmeus, Syst. Nat,, ed. x, 233, 1758, coast of Europe. 



72. Squalus sucklii (Girard). California Dogfish 



Aleutian Islands to Santa Barbara. 



Spinax (Acanthias) sucklii Girard, Proc. Ac. Nat. Sci. Phila. 1854, 196, Fort Steila- 

 coom, Washington. 



Genus 38. CENTROSCYMNUS Socage & Capello. 



Centroscymnus Bocage & Capello, Proc. Zool. Soc. Lond. 1864,263 (ctelolepis). 



73. Centroscymnus coelolepis Bocage & Capello. 



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



and Nova Scotia Banks. 

 Centroscymnus calolepis Bocage & Capello, Proc. Zool. Soc. Loud. 1864, 263, 



Portugal. 



Genus 39. ETMOPTERUS Rafinesque. 

 Etmopterus Rafinesque, Caratteri, etc., 14. 1810 (aculeatus). 



74. Etmopterus pusillus (Lowe). 



Madeira, Cuba, and Cape Vevdes. 



Acanthidium pusillum Lowe, Proc. Zool. Soc. Lond. 1839, 91, Madeira. 



Genus 40. CENTR03CYLLIUM MuUer & Henle. 



CentroscyUium Miiller & Henle, Plagiostomen, 191, 1838 (Jabricii). 



75. CentroscyUium fabricii (Reiuhardt). 



Greenland seas, Gloucester, and the Nova Scotia Banks. 



Spinax fabricii Reinhardt, Dansk. Vid. Selsk. P'orh., 1828, iii, xvi, Greenland. 



Family XIX. SOMNIOSID^. The Scymnoid Sharks. 



Genus 41. SOMNIOSUS LeSueur. 



Somniosus LeSueur, Jour. Ac. Nat. Sci. Phila. 1818, 222 {brevipinna = micro- 

 cephalus). 



76. Somniosus microcephalus (Bloch). Sleeper Shark; Xurse. 



Arctic seas, south to Cape Cod, Oregon, and France. 



Squalus microcephalus Bloch &■ Schneider, Syst. Iclith., 135, 1801, northern seas. 



Family XX. ECHINORHINIDiE. The Bramble Sharks. 



Genus 42. ECHINORHINTIS Blamville. 



Echinorhinun Blaiuville, Bull. Soc. Philom. 1816, 121 {spinosua). 



77. Echinorhinus spinosus (Gmelin). 



Atlantic coasts of Europe, Aiuerica. and Africa. 



Squalus spinosus Gmelin, Syst. Nat., i, 1500, 1788, "the ocean." 



