FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 327 



U.S.N.M. No. 39996. Paramatta River, New South Wales. Australian Museum. 



Length, 583 mm. 

 U.S.N.M. No. 29012. Locality ? Donor ? Length, 670 mm.; skinned out. 

 U.S.N.M. No. 29013. Locality ? Donor ? Length, 780 mm.; skinned out. 

 U.S.N.M. No. 39995. Paramatta River. Australian Museum. Length, 465 mm. 



Family PLATYRHINIDAE 



Disk large, wide, circular. Tail rather slender, axis not raised, 

 fold along each side. Snout broad, blunt. Nostrils nearly trans- 

 verse ; valves variable ; nasoral grooves rudimentary or absent. Dor- 

 sals two, far behind ventrals. Caudal moderately long, subcaudal 

 without lobe and nearly equals supracaudal. Pectorals wide, rounded, 

 extend forward to snout end. Claspers unsegmented. 



Genera few, oviparous or viviparous. 



ANALYSIS OF GENERA 



a\ Platyrhininae. Rostral cartilages present ; two dorsals. 



&\ Rostrum extends to end of snout, pointed ; front nasal valves joined across 



interspace Zanobatus 



&l Rostrum' short, wide, not half length of snout ; front nasal valve not joined 



across internarial space Platyrhina 



a\ Abhynohobatinae. Rostral cartilages absent ; one dorsal fin. 



Arhynchobatis 

 Genus ZANOBATUS Garman 



Zanobatus Gabman, Mem. Mus. Comp. Zool., vol. 36, p. 291, 1913. (Type, 

 Plaiyrli'ma schocnlernii Miiller and Henle, monotypic. ) 



Disk wider than long, partly rounded. Tail slender, nearly half 

 total length. Snout short, blunt, rostral cartilages small and grad- 

 ually tapering. Nostrils transverse, narrow, interspace wide; front 

 valves confluent, hind ones with inner portion large, reaching mouth. 

 Spiracles large, without fold. Fins rounded. Dorsals small, far be- 

 hind ventrals. Caudal small, rounded. Pectorals very wide, sepa- 

 rated at end of snout. Ventrals close to pectorals. 



India. 



ZANOBATUS SCHOENLEINII (Muller and Henle) 



Platyrhina schoenleinii Muxlek and Henle, Syst. Beschr. Plagiostomen, p. 125, 

 pi. 45, 1841 ( type locality : India). — Bleekeb, Verh. Batav, Genootsch. (Ben- 

 gal), vol. 25, p. 82, 1853 (reference). — DuMliiEiL, Hist. Nat. Elasmobr., vol. 1, 

 p. 577, 1865 (India).— GtJNTHEK, Cat. Fish. Brit. Mus., vol. 8, 1870, p. 471 

 (compiled). — Day, FLshes of India, pt. 4, p. 735, 1878 (Madras Museum) ; 

 Fauna British India, Fishes, vol. 1, p. 47, 1889. 



fPlatyrhina schoctilchri Steindachnee, Denkschr. Akad. Wiss. Wien, vol. 44, 

 p. 50, pi. 7, 1882 (Goree). 



Dl;scobafns schonlcinii Gabman, Proc. U. S. Nat. Mus., vol. 3, p. 523, 1880 (India ; 

 reference). 



Zanobatus schocnlcini Garman, Mem. Mus. Comp. Zool., vol. 36, p. 291, 1913 

 (compiled). 

 156861—41 22 



