378 



I'ATAc.dNiAN i':.\i'i':i)rrioN!- 



,\. 



Narcine coralliiia (jarnian; Xarciiw 

 uvibrosa Jordan ; Torpedo bancrofti 

 Griffith; Narcine nigra Dumeril; 



Torpedo pictits Gronow. 

 Habitat: Pcnsacola and Key West to 

 Brazil, entering rivers. 



Suborder MASTICURA. 

 Family MYLIOBATID^. 



Myi,ioi!.\TIS Dumeril. 



Holorhinus Gill. 



Type: Raja aqiiila Linnaeus 



Range : Warm seas. 

 I. Myliobatis aqiii/a ( Linnaeus), 



Gunther, VI 11. 4-% 

 Habitat: All warm seas; La Plata. 



Family DASVATID.^,. 



P.\K.\TUVG().N Uumcril. 



Disceus Garman. 



Type: Trygon aicreba Cuvier. 

 Range that of the single species, 

 I. Paratrygon strongylopterus (Schom- 



burgk), Gunther, VIII, 476. 



Trygon aiereba Dumeril; Trygon or- 

 bicularis Giinther. 

 Habitat : British Guiana ; Amazons. 



PoT.A.MOTRVGOX Garman. 

 Type: Petstinaca humboldtii Roulin. 

 Range : Fresh waters of South America. 

 . Potaiiiotrygoii brac/iynriis (Giinther), 



Gunther 1880, 8. 

 Habitat: La Plata. 

 l2. Potainotrygon humboldtii (Roulin). 

 Trygon hystrix Miiller & Henle. 

 ? Trygon garrapa Schomburgk. 

 Habitat: Rivers from the La Plata to 

 the Orinoco ; Paraguay, Rio 

 Branco; Orinoco at Apure. 

 . Potainotrygon d'orbiguyi (Castelnau), 



Gunther, VI 1 1, 484- 

 Habitat: Orinoco. 



A4. Potainotrygon rcticulatus Cjiinthcr, as 

 hystrix Giinther, VIII, 482. 

 Habitat: Surinam; Santarem. 

 5. Potainotrygon inagdalencc^ (Steindach- 



ner) Steindachner, 1S78, 56. 



Habitat : Rio IVIagdalena. 

 A6. Potainotrygon motoro (Miiller & 



Henle), Giinther, VIII, 484. 



Trygon henlei Castelnau ; Trygon gar- 

 rapa Schomburgk; Ticniiira initllcri 

 and henlei Castelnau. 

 Habitat: Rio Cuyaba ; Rio Branco. 

 .V/. Potainotrygon dunierilii (Castelnau), 

 Gunther, VIII, 484. 

 Habitat: i\raguay; Tocantins; Rio 

 Crixas; Paraguay. 



Li.Lii'ESURUs Schomburgk. 



Type : Ellipesiirus spinicauda Schom- 

 burgk. 

 Range that of the single species. 

 A I. Ellipesurus spinicauda Schomburgk, 



Gunther, VIII, 472. 

 Habitat: Rio Jurua; Rio Branco. 



Garman considers d'o) 

 onymous willi humboldlii. 



and magdaleiKe syn- 



