494 MTLIOBATIDiE. 



six times as long as broad, and those of the adjoining series rather 

 more than thrice. The middle teeth of the lower jaw narrower than 

 those of the upper. Tail more than twice as long as the disk. 

 Brazil. 



3. Ehinoptera lalandii. 

 Miill. 4- Henle, p. 182 ; Dumeril, Elasmobr. p. 645. 



Dentition of the upper jaw different from that of the lower. Five 

 or seven series in the upper jaw, the teeth of the middle series being 

 six times as broad as long, and those of the next following series 

 about twice as broad as long. Lower jaw with seven series, the 

 teeth of the middle series being foiu- times as broad as long. Tail 

 nearly twice as long as the disk. 



Brazil. 



a. Young: stuffed. Purchased. 



4. Ehinoptera javanica. 



Monro, PJii/s. Fixch. taf. ?,4. figs. 2-4 (teeth). 



Ehinoptera javanica, Miill. cV Henle, p. LS2, taf. 58 ; Bleeh. Verh. Bat. 



Ge7i. xxiv. Plcff. p. 89 ; Dumeril, JSlasmobr. p. 647. 

 affiuis, Bleek. Nat. Verh. Holl. Maatsch. Wet. Haarlem, I860, 



Giiinee, p. 19 (foetus). 



Disk not twice as broad as long. Median notch of the snout 

 shallow. Seven series of teeth in each jaw, those of the middle 

 upper series about four times as broad as long, and not quite twice 

 as broad as the next adjoining teeth. Lower teeth rather narrower 

 than the upper. Tail not twice as long as the disk. 



East Indies. 

 a. Foetus. Java. From Dr. Bleeker's Collection. — Type of Rh. 



affiius. 

 h, c. Upper jaws of adult examples. 



A large example, obtained by the Antarctic Expedition, without 

 teeth, and generally in very bad condition, has been named Rh. 

 smithii by Dr. Gray. It probably belongs to this species. 



5. Ehinoptera quadriloba. 



Raja bonasus, Mitch. Trans. Lit. ^- Phil. Soc. Kcw York, i. 1815, 



p. 479 (no descr.). 



quadriloba, Lesueur, Journ. Ac. Nat. 8c. Philad. i. p. 44. 



Ehinoptera quadriloba, Cuv. Rec/ne An. ; Dehay, Neio York Faun. 



Fish. p. 375, pi. 66. fig. 217 ; Dumeril, Elasmobr. p. 648. 



Disk more than twice as broad as long. Median notch of the 

 snout deep. Seven series of teeth in each jaw, those of the middle 

 upper series about four times as broad as long. Tail a little longer 

 than the disk. 



Atlantic coasts of the United States. 



6. Ehiaoptera adspersa. 



3M1. (*»'• Henle, p. 18.3; Dumeril, Elasmobr. p. 648. 

 Upper surface covered with minute stellate asperities. Teeth in 



