446 THE PLAGIOSTOMIA. 



next rows about half as wide, and the third at each side httle broader than long; 

 outer teeth narrowest, pentagonal. Ventrals longer than wide, with angles 

 rounded, subtruncate. Dorsal between the ventrals, origin above ends of 

 ventral bases, rounded above, with a short free margin and a slightly produced 

 angle behind the base. Tail nearly twice the length of the disk, with a spine 

 behind the dorsal. Skin smooth. 



Back brown, greenish, and bronzed; lower surfaces white. In life more or 

 less tinted with red. 



Mediterranean. 



Rhinoptera steindachneri. 



Rhinoptera steindachneri Evermann & Jenkins, 1891, Proc. U. S. nat. miis., 14, p. 130, pi. 1, f. 1. 



Width of disk nearly twice its length. Pectorals little longer than wide, 

 outer angle acute, apex narrowly rounded, hind angle more broadly rounded. 

 Teeth in seven rows: — median row nearly three times and the next one to it 

 nearly twice as wide as long. Ventrals narrow, elongate, posterior border 

 convex. Dorsal rounded above, hind angle slightly produced beyond the base, 

 origin behind the ends of the pectoral bases, tip not reaching to ends of ventral 

 bases. Tail longer than the disk. Skin smooth. 



Uniform dark brown; white below. 



Gulf of Cahfornia. 



Rhinoptera javanica. 



Rhinoptera javanica Muller & Henle, 1841, Plagios., p. 182; Bleeker, 1852, Verb. Bat. gen., 24, 

 Plagios., p. 89; Dum^ril, 1865, Elasm., p. 647; Gunth., 1870, Cat. fishes Brit, mus., 8, p. 494; 

 Day, 1878, Ind. fishes, p. 744, pi. 195, f . 4. 



Rhinoptera affinis Bleeker, 1862, Nat. verh. Holl. maatsch. wetensch., p. 19. 



Proportions similar to those of R. marginata. Disk less than twice as 

 broad as long; tail nearly twice the length of the disk. A shallow notch in 

 front of the snout. Teeth in seven rows, those in median row three to five times 

 as wide as long, those in the two next rows about half as wide as the median, 

 and those in the outer two rows on each side as wide as long; median rows nar- 

 rower on lower jaws. Dorsal origin above the ends of the ventral bases. Skin 

 smooth. 



Blackish green; ventral surface white. 



Java; India. 



