474 MEMOIRS OF THE CARNEGIE MUSEUM 



Interorbital space very broad and flat. Preopercle with spines or serrae on 

 the free margin. Anal and soft dorsal well scaled. The single species, S. rastrifer 

 Jordan, was taken in fresh water at Mahaica. 



320. Stellifer rastrifer Jordan and Eigenmann. 



Stelliferus rastrifer Jordan and Eigenmann, Rept. U. S. Fish Com. for 1886, 1889, 



393.— Jordan and Evermann, Bull. U. S. Nat. Mus. No. 47, II, 1898, 1441 



(name only). 



Seven specimens, 45-133 mm. Georgetown market. (C. M. Cat. No. 2472a- 

 d; I. U. Cat. No. 12569.) 



One specimen, 72 mm. Mahaica. (C. M. Cat. No. 2473a.) 



Head 3-3.3; depth 3-3.2; D. XI-I,21 or 22; A. 11,8 or 9; scales 49-50 (pores), 

 four in vertical series above and seven in vertical series below the lateral line; eye 

 nearly round, 4-4.25 in the head; interorbital nearly flat, 1.5 times the eye, 3 in 

 the head. 



Compressed; snout short and blunt, 4.3 in the head; preopercle strongly 

 rounded, with but two spines, the upper directed backwards, the lower more or 

 less downwards. Mouth large, a little oblique; the lower jaw included; maxillary 

 reaching the posterior margin of the eye. Second anal spine enlarged, 1.9-2.2 in 

 the head. Gill-rakers 14 + 25, very long and slender. 



Color light; membrane of the spinous dorsal and tips of the anal rays blackish 

 on the inner side, a dark spot just beneath the upper edge of the dorsal fin. Caudal 

 and soft dorsal somewhat dusky. Scales and upper part of the sides outlined 

 with dusky. Large chromatophores scattered over the top of the head, snout, and 

 middle of the sides. Inside of opercle with a large blackish spot. 



Pachypops Gill. 81 



Pachypops Gill, Proc. Acad. Nat. Sci. Phila., 1861, 87. 



Type, Micropogon trifilis M tiller and Troschel. 



A fresh-water genus, very close to Pachyurus, from which it is distinguished by 

 the barbels on the chin. Represented in this region by two species, which may be 

 separated as follows. 



81 The type of the species of Pachypops trifilis Midler and Troschel (1S4S) from Guiana has been kindly 

 examined for us by Dr. P. Poppenheim, Konigl. Zoologischen Museum, Berlin. From his descriptions and the 

 original descriptions of Miiller and Troschel we believe their P. trifilis to be synonymous with P. fur crams 

 Lacepede (1802), which means that Steindachner's P. trifilis was probably new and not the P. trifilis of Midler 

 and Troschel. 



