ElGENMANN : THE EXPEDITION TO BRITISH GUIANA. 13 



Carnegiella* gen. no v. 



Type : Gasteropelecus strigatus Giinther. 4 



Carnegiella is distinguished by the following general characters : 

 No adipose fin. Premaxillary with about nine tricuspid teeth in a 

 single series ; maxillary with a single, large, conical tooth at its upper 

 anterior angle ; lateral line broken after the sixth pore. 



Carnegiella strigata (Giinther). 



Head about 4 ; depth about 2 ; D. 10 ; A. 27-29; scales 30, 12-15 

 pores in the lateral line, the line broken after the sixth scale ; eye 3 

 in the distance from tip of chin to end of opercle. 



Of this species I secured the following specimens : 



Sixty-eight specimens, 20-42 mm. Maduni Creek. (C. M. No. 

 1296, a-o; I. U. M. No. 11784.) 



Forty-three specimens, 30-37 mm. Woodland brook on Gluck 

 Island. (C. M. No. 1297, a-o ; I. U. M. No. n 785.) 



Fourteen specimens, 30-39 mm. Malali. (C. M. No. 1298, a-e ; 

 I. U. M. No. 11786.) 



Seven specimens, 33-36 mm. Tumatumari. (C. M. No. 1299, 

 a-e; I. U. M. No. 11787.) 



Sixteen specimens, 35-44 mm. Creek below Potaro Landing. (C. 

 M. No. 1300, a-e; I. U. M. No. 11788.) 



One specimen, 30 mm. Rupununi Pan. (C. M. No. 1301.) 



This species is found in small, woodland streams ; thus contrasted 

 with the species of Gasteropelecus, which are pelagic in their habit. 



Subfamily TETRAGONOPTERIN^. 



Genus Moenkhausia Eigenmann. 



Moenkhausia browni sp. now 



(Native name " Conia.") 

 Type, 66 mm. (No. 1004 Carnegie Museum Catalog of Fishes.) 

 Aruataima Falls, Potaro River. 



3 At the suggestion of my friend, Doctor W. J. Holland, I take great pleasure in 

 naming this genus for Miss Margaret Carnegie. 



4 The species strigatus is based on two badly preserved specimens, one and a 

 half inches long, from the " Old Collection," without locality. The characters given 

 are : " D. 9 ; A. 27 ; lat. 1. 25. Thorax with four blackish bands radiating from the 

 middle of its convex edge ; a blackish band along the base of the anal fin." 



The genus Carnegiella is based on specimens collected by me in British Guiana. 

 They are most probably the Gasteropelecus strigatus of Giinther, with which the 

 G. fasciatus of Garman is synonymous. 



