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.