CONTENTS V 



Class Pisces — Continued. 



Subclass Elasmobranchii — Continued. 

 Order Asterospondyli — Continued. 



Family Galeorhinidae — Continued. ^ase 



Genus Eridacnis H. M. Smith 200 



Genus Mustelus Linck 201 



Subgenus Pleuracromylon Gill 202 



Subgenus Mustelus Linck 205 



Genus ScylUogaleus Boulenger 209 



Family Sphyrnidae 210 



Genus Sphyrna Rafinesque 211 



Subgenus Platysqualus Swainson 212 



Subgenus Sphyrna Rafinesque 213 



Subgenus Eusphyra Gill 221 



Order Cyclospondyli 222 



Family Squalidae 223 



Genus Centroscymnus Bocage and Capello 223 



Genus Scymnodon Bocage and Capello 225 



Subgenus Zameus Jordan and Fowler 226 



Subgenus Proscymnodon Fowler 228 



Genus Cenlrophonts MuUer and Henle 228 



Genus Deania Jordan and Snyder 236 



Subgenus Deania Jordan and Snyder 237 



Subgenus Nasisqualus Smith and Radcliffe 241 



Genus Entoxychirus Gill 242 



Subgenus Entoxychirus Gill 243 



Subgenus Atractophorus Gilchrist 245 



Genus Etmopterus Rafinesque 246 



Subgenus Acanthidium Lowe 246 



Subgenus Etmopterus Rafinesque 250 



Genus Centroscyllium Miiller and Henle 252 



Subgenus Centroscyllium MuUer and Henle 252 



Subgenus Paracentroscyllium Alcock 254 



Genus Squalus Linnaeus 255 



Subgenus Squalus Linnaeus 257 



Subgenus Cirrhigaleus Tanaka 262 



Genus Oxynotus Rafinesque 262 



Family Dalaliidae 263 



Genus Euprotomicrus Gill 264 



Genus Dalatias Rafinesque 266 



Genus Isistius Gill 269 



Genus Heteroscymnus Tanaka 272 



Genus Heteroscymnoides Fowler 273 



Genus Pseudoscymnus Herre 274 



Genus Somniosus Lesueur 275 



Genus Echinorhinus Blainville 277 



Order Squatinae 279 



Family Pristiophoridae 279 



Genus Pristiophorus Miiller and Henle 279 



Genus Pliotrema Regan 283 



Family Squatinidae 284 



Genus Squatina Dum^ril 284 



