eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 449 



Origin of dorsal equidistant from snout and caudal; origin of anal under last 

 dorsal ray; pectoral reaching a little past the origin of the ventrals. 



Scales deciduous, those of the sides with faint vertical lines, those of the caudal 

 peduncle reticulate. 



Silvery, without a band; sides with faint dots, back dotted, and a row of dots 

 along the base of the anal. 



292. Stolephorus spinifer (Cuvier and Valenciennes). 



Engraulis thrissoides Muller and Troschel, in Schomburgk, Reisen, III, 1848, 



639 (Cuyuni). 

 Engraulis spinifer Cuvier and Valenciennes, Hist. Nat. Poiss., XXI, 1848, 39 



(Cayenne). — Gunther, Catalogue, VII, 1868, 394 (British Guiana). 

 Stolephorus spinifer Jordan and Evermann, Bull. U. S. Nat. Mus. No. 47, 1896, 



448. — Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 451. 



Two specimens, 78 and about 205 mm. Georgetown market. (C. M. Cat. 

 No. 2446; I. U. Cat. No. 12560.) 



Head 4; depth 4; D. 15; A. 36; scales about 40; eye .8 in the snout, 4.5 in 

 the head. 



Compressed; posterior margin of opercle and preopercle very oblique; sub- 

 opercle with a triangular projection; maxillary reaching to the gill-opening. Snout 

 projecting; gill-rakers 1.5 in the eye, sixteen on the lower arch, fourteen on the 

 upper. 



Origin of dorsal nearer to snout than to base of caudal; ventrals a little in 

 advance of the dorsal; pectorals reaching past origin of the ventrals; origin of anal 

 a little in advance of the base of the last dorsal ray. Scales frosted, with fine 

 reticulations. Silvery, back dotted, caudal bordered with dark. Brilliant orange 

 in life. 



I have also examined the specimen mentioned by Muller and Troschel and 

 preserved in the Berlin Museum. 



Family XV. OSTEOGLOSSID.E. 



Osteoglossum Vandelli. 



Osteoglossum (ex Vandelli) Agassiz, Selecta Gen. et Spec. Pise. Bras., 1829, 45. 

 Ischnosoma Spix, Selecta Gen. et Spec. Pise. Bras., 1829, 46. 



Elongate, abdomen compressed to an edge; a pair of barbels on the lower 

 jaw. 



