VI BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Class Pisces — Continued. 



Subclass Elasmobranchii — Continued. Page 



Order Rajae 289 



Family Pristidae 290 



Genus Pristis Linck 291 



Subgenus Pristis Linck 291 



Subgenus Pristiopsis Fowler 295 



Family Rhinobatidae 297 



Genus Rhina Schneider 298 



Genus Rhynchohatus Miiller and Henle 300 



Genus Rhinobatos Linck 304 



Subgenus Leiobatus Rafinesque 307 



Subgenus Rhinobatos Linck 315 



Genus Aptychotrema Norman 322 



Genus Try gonor rhina Miiller and Henle 325 



Family Platyrhinidae 327 



Genus Zanobatus Garman 327 



Genus Platyrhina Miiller and Henle 328 



Genus Arhynchobatis Waite 331 



Family Torpedinidae 332 



Genus Narcine Henle 332 



Genus Heteronarce Regan 337 



Genus Benthobatis Alcock 339 



Genus Hypnos Dum6ril 340 



Genus Torpedo Houttuyn 341 



Subgenus Torpedo Houttuyn 342 



Subgenus Tetronarce GiVL 345 



Genus Narke Kaup__ 347 



Subgenus Narke Kaup 349 



Subgenus Bengalichthys Annandale 352 



Genus Typhlonarke Waite 352 



Genus Temera Gray 353 



Family Rajidae 354 



Genus Raja Linnaeus 355 



Genus Psammobatis Gtinther 395 



Family Dasyatidae 396 



Genus Taeniura Miiller and Henle 397 



Genus Dasyatis Rafinesque 401 



Subgenus Himantura MiiUer and Henle 405 



Subgenus Pastinachus Riippell 413 



Subgenus Z)as?/ahs Rafinesque 420 



Subgenus Amphotistius Garman 421 



Genus Urogymnus MiiUer and Henle 437 



Genus Urolophus Miiller and Henle 439 



Subgenus Urolophus Miiller and Henle 440 



Subgenus Trygonoptera Miiller and Henle 443 



Genus Anacanthobatis Von Bonde and Swart 448 



Genus Urolophoides Soldato v and Lindberg 449 



Genus Gymnura Kuhl 449 



Subgenus Aetoplatea Valenciennes 450 



Subgenus Gymnura Kuhl 452 



Family Myliobatidae 457 



Genus Holorhinus GUI 458 



Genus Aetomylus Garman 464 



