1914.]. NATURAL SCIENCES OF PHILADELPHIA. 229 



FISHES FROM THE RUPUNUNI RIVER, BRITISH GUIANA. 

 BY HENRY W. FOWLER. 



In the fall of 1912 the Academy received a collection of fresh- 

 water fishes from the Rupunmii River, in the highlands of British 

 Guiana. The specimens were purchased from Mr. J. Ogilvie, 

 who collected them during the same, year and in 1911. Mr. Ogilvie 

 informs me, in lieu of the name of any settlement or towm, they were 

 approximately secured in North Latitude 2° to 3°, and West Longi- 

 tude 50° 20'. A number are apparently new or undescribed, while 

 others are not only new records for the Rupununi, but also for Guiana 

 as well. The figures are all drawn to scale, each number over the 

 accompanying line signifying millimeters. 



SELACHII. 

 DASYATID^. 

 Potamotrygon hystrix (Miiller and Troschel). 



One young fcetal example. Color pale uniform brown. Six pa- 

 pillae on floor of mouth. Body mostly smooth, without prickles 

 or warts. Length 145 mm., disk width 60 mm. 



TELEOSTOMI. 

 OSTEOGLOSSID^. 

 Osteoglossum bicirrhosum Agassiz. Fig. l (young). 



One 273 mm. Also three young with yolk-sacs still adherent. 

 According to Mr. Ogilvie, this fish carries its young in its mouth 

 until they wholly absorb the yolk and they are able to fend for 

 themselves. 



CHARACID^. 



CUR1MAT1N.E. 

 Curimatus oyprinoides (Linnseus). 



One example, which agrees with my Ambyiacu River examples 

 in the absence of gill-rakers, and with my figure.^ 



Dr. Eigenmann rightly corrects my use of Curimata- to the present 



' Proc. Acad. Nat. Sci. Phila., igOfj, p. 301, fig. 6. 

 2 A7ner. Noi., XLI, 1907, p. 768. 



