NATURAL SCIENCES OF PHILADELPHIA. 261 



Squalus littoralis MiL, Am. Monthly Mag. &c. ii. 328. 

 Squalus macrodus Mit., op. cit. ii. 328. 

 Oarcharias littoralis DeKay, iv. 351. 

 Oarcharias griseus Ayres, Boston Journ. iv. 293. 

 Odontaspis griseus Desor, Bost. Proc. ii. 264. 

 Eugemphodus griseus Gill, Cat. 60. 

 Odontaspis americanus Abbot, Proc. Ac. N. S. 

 Eugompnodus littoralis Gill, op. cit. 1863, 333. 

 Hab. Mass. to New Jersey. 



ALOPECOIDjE. 



ALOPIAS Raf. 



Alopias vulpbs, Bon. 



Thresher or long tailed Shark Mitch., Med. Rep. 2d hex., ii. 77. 

 Squalus vulpes (L.) Mitch. 

 Carcbarias vulpes DeK., iv. 348. 

 Alopias vulpes Storer, Syn. 253. 

 Hab. Mass. southwards. 



CESTRA CIONTOIDjE. 



CESTRACION Klein. 

 Sphyrna Raf., 1810. 

 Sphyrnias Raf., 1815. 

 Oestrorhinus Blainv., 1816. 

 Zygaena Cuv., 1817. 

 Platysqualus Sw., 1839. 

 Spbyra Vanderhoeven. 



Cestracion zyg-ena, Gill. 



Squalus zygaena L. Mitch., Trans. N. Y. i. 482. 

 Zygaena malleus Cuv. 

 Sphyrna zygaena M. and H. 

 Sphyrnias zygaena Gray. 

 Zygaena subarcuatus Storer. 

 Cestracion subarcuatus Gill, Cat. 

 Cestracion zygaena Gill, Squali. 

 Hab. Eastern coast generally. 



RENICEPS Gill. 



Reniceps tiburo Gill. 

 Squalus tiburo Linn. 

 Cestrorhinus tiburo Blainv. 

 Zygaena tiburo Vol. 

 Sphyrna tiburo M. and H. 

 Sphyrnias tiburo Gray. 

 Cestracion tiburo Gill, Cat. 

 Reniceps tiburo Gill, Squali. 

 Hab. New York southwards. 



' GALEORHINOIDJE Gill. 

 GALEORHINWjE Gill. 

 GALEORHINI. 

 EULAMIA Gill. 

 Carcharias Cuv., (not l$af.) 

 1864.] 



