SOUTH AMERICAN NEMATOGNATHI. 345 



laries only; mouth subinferior. Body terete, greatly 

 elongate; opercle and preopercle with spines. Gill-mem- 

 branes broadly united with the skin of the isthmus, the 

 gill-opening being reduced to a short slit in front of the 

 pectoral. Orbit without a free margin. Dorsal fin placed 

 posteriorly and behind the ventrals. 



Habitat: Solimoens and westward to the Andes. 



ANALYSIS OF THE SPECIES OF VANDELLIA. 



a. Head 9 in the total length; caudal rounded. cirrhosa 284. 



aa. Head about 12 in the total length; caudal slightly emarginate; a dusky 



median stripe on caudal. jAazaii 285. 



284. Vandellia cirrhosa. 



VaadeUla cirrhosa Cuv. & Val. Hist. Nat. Poiss. xviii, 386, pi. 547, 

 1846 (loc. ?); Casteluau, Anim. Amer. du Sud, 51, pi. 28, fig. 2, 

 1855 (Brazil); Gtlnther, Cat. Fish. Brit. Mus. v, 277, 1864 (cop- 

 ied); Eigeum. & Eigenm. Proc. Cal. Acad. Sci. 2d Ser. ii, 55, 

 1889 (Hyavary). 



Habitat : Hyavary . 



Head slightly longer than wide; snout rounded. Eye 

 large, less than 1 in the snout, less than 3 in the head. 

 Mouth rather small, the upper jaw little projecting; a 

 few long, pointed teeth on the intermaxillaries. Barbel 

 comparatively long, about 2 in the head; lower lip not 

 dilated. Opercle and preopercle each wdth a bunch of 

 6-10 spines. 



Origin of the dorsal fin twice as far from tip of snout 

 as from margin of caudal, the dorsal fin placed partly 

 over the anal. 



Uniform light brown. 



Head 9 in the total length; D. 9; A. 10. 



One specimen .04 m. Hyavary. Bourget. 



285 Vandellia plazaii. 



Vandellia jdazail Casteluau, 1. c. pi. 28, fig. 1, 1855 (Ucayale); Vail- 

 lant. Bull. Soc. Philom. Series 7, iv, 159, 1880 (Calderon); 

 Eigenm. & Eigenm. 1. c. (Lake Hyanuary). 



Vandellia plazce Giinther, Cat. Fish. Brit. Mi;s. v, 277, 1864 (copied). 



Habitat: Ucayale; Calderon; Lake Hyanuary. 



One specimen .125 m. Tiake Hyanuary. Bourget. 



