eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 433 



line) ; small golden brown spots on the median dorsal line at the junction of the dark 

 bands from the sides; top and sides of the head almost black, with numerous pale 

 yellow streaks crossing them; cheeks lighter; pectorals mottled with black; anal 

 with numerous brown spots in the yellow interspaces between the brown bands. 



Hypopomus Gill. 

 Hypopomus Gill, Proc. Acad. Nat. Sci. Phila., 1864, 152 (mulleri). 

 Brachyrhamphichthys Gunther, Catalogue, VIII, 1870, 6. 



Type, Rhcmiphichthys mulleri Kaup. 



No caudal fin; snout short and not tubular; eyes without free orbital margin; 

 teeth wanting; body rather cylindrical, head somewhat pointed. 



Two species were taken in British Guiana. 



Key to the Guiana Species op Hypopomus. 

 a. Snout blunt; length of head less than greatest depth of body; caudal appendage 4.5-5 in the total length. 



brevirostris. 



aa. Snout somewhat pointed; length of head greater than greatest depth of body; caudal appendage 3-3.5 in 



the total length artedi. 



276. Hypopomus brevirostris (Steindachner). 

 Rhamphichthys brevirostris Steindachner, "Die Gymnotidse," 1868, 6, pi. 2, fig. 2. 

 Brachyrhamphichthys brevirostris Eigenmann and Eigenmann, Proc. U. S. Nat. 



Mus., XIV, 1891, 62. 

 Hypopomus brevirostris Eigenmann and Kennedy, Proc. Acad. Nat. Sci. Phila., 



1903, 530.— Eigenmann and Ward, Proc. Wash. Acad. Sci., VII, 1905, 170 — 



Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 449. 



Four specimens, 57-165 mm. Mud Creek, Aruka River. (C. M. Cat. No. 

 1792a; I. U. Cat. No. 12615.) 



Four specimens, 62-165 mm. Chipoo Creek. (C. M. Cat. No. 1793a-&; 

 I. U. Cat. No. 12616.) 



Two specimens, 95-105 mm. Pacopoo Pan. (C. M. Cat. No. 1794a; I. U. 

 Cat. No. 12617.) 



Four specimens, 118-160 mm. Nickaparu Creek. (C. M. Cat. No. 1795a; 

 I. TJ. Cat. No. 12618.) 



One specimen (broken), 80 mm. Savannah Landing. (C. M. Cat. No. 1796a.) 



One specimen, 95 mm. Creek below Savannah Landing. (I. U. Cat. No. 

 12635.) 



One specimen, 117 mm. Twoca Pan, Rupununi. (C. M. Cat. No. 1797a.) 



One specimen, 70 mm. Kumaka. (C. M. Cat. No. 1798a.) 



