304 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



angles, internasal space nearly equals nostril length or slightly nar- 

 rower; interorbital rather broad, more or less flattened, with ridge 

 provided by series of obtuse spines on front and upper edge of 

 orbit. Gill openings 5, inferior, last one slightly smaller. Spiracles 

 smaller than eye, short space posterior, with 2 distinct valves on 

 inner hind edge. 



Skin finely roughened. Series of obtuse spines on middle line of 

 back from occiput to second dorsal origin, those between dorsals 

 much smaller. Two pairs of spines and another single one on each 

 side of shoulder girdle, another series of spines on supraorbital 

 ridges as above mentioned. Each side of tail with cutaneous fold, 

 more prominent posteriorly. 



First dorsal inserted above or slightly behind ventral origin with 

 hind edge concave and lower angle acute; second dorsal inserted at 

 hind third of space between first dorsal origin and caudal base, 

 like first dorsal only slightly smaller. No anal. Caudal gently bent 

 up, subcaudal well developed, separated from supracauclal by deep 

 notch. Pectoral edge behind straight, inner angle acute. Ventral 

 far separated from pectoral, interspace much greater than ventral 

 base. Clasper slender. 



Gray brown above, dirty white below. Lateral whitish horizontal 

 band from hind edge of pectoral to caudal base. Back between 

 dorsals with 2 series of white spots. Dark spot on shoulder girdle. 

 Dark oblong spot on eye immediately before spiracle. Dusky spot 

 on side of snout not far from tip. 



Length to last vertebra, 1,010 mm. (Wang.) 



China. Differs from Rhynchobatus djiddensis in dentition and 

 color. Second dorsal more posteriorly inserted and first dorsal 

 advanced. 



Genus RHINOBATOS Linck 



Rhinolatos Linck, Mag. Phys. Naturg. Gotlia, ser. 3, vol. 6 p. 32, 1790. (Atypic. 



Type, Raja rhinobatos Linnaeus, assumed tautotype.) 

 Rhinobatus (Klein) Walbaum, Artedi Pise, vol. 3, p. 581, 1792. (Atypic. Type, 



Raja rhinobatos Linnaeus, assumed tautotype.) (Inadmissible.) — 



Schneider, Syst. Ichth. Bloch, p. 353, 1801. (Type, Raja rhinobatos 



Linnaeus, tautotypic.) 

 Rhinobatis Blainviixe, Faune Frangaise, Poissons, p. 47, 1825. (Tj^pe, Raja 



rhinobatos Linnaeus.) 

 Rhinobates Swainson, Nat. Hist. Animals, vol. 2, p. 193, 1839. (Type, Raja 



rhinobatos Linnaeus). 

 Leiobatus Rafinesque, Caratteri nuovi animali piante Sicilia, p. 16, 1810. 



(Type, Leiobatus panduratus Rafinesque, monotypic.) (Not precluded by 



Leiobatus Klein.) 

 Leiobatis Blainville, Faune Frangaise, Poissons, p. 43, 1825. (Type, Leiobatus 



panduratus Rafinesque.) 

 Squatinoraja Naedo, Osservazioni ed aggiunte all' Adriaticae ittiologia . . ., 1824. 



(Type, Squatinoraja colonna=Rhinobatus columnae Miiller and Henle. ) 



