eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 165 



Magdalena) ; " Fisch-Fauna Magdalenen-Stromes," 1878, 17 (Magdalena) ; 



" Fisch-Fauna des Cauca," etc., 1880, 7 (Cauca). 

 Rhamdia sebce Eigenmann and Eigenmann, Proc. Cal. Acad. Sci. (2), I, 1888, 126 



(Tonantins; Gurupa; Rio Janeiro; Bahia; Xingu; Santa Cruz; Cudajas; Sao 



Matheos; Rio Doce; Serpa; Tabatinga; Goyaz; Para; Teffe; Surinam; 



Villa Bella); Occasional Papers Cal. Acad. Sci., I, 1890, 123; Proc. U. S. 



Nat. Mus., XIV, 1891, 28.— Eigenmann, Repts. Princeton Univ. Exp. Pata- 

 gonia, III, 1910, 385. 

 Pimelodus stegelichii Mulle and Troschel, in Schomburgk, Reisen, III, 1848, 628 



(forest brooks); Horae Ichth., Ill, 1849, 3 (Surinam). — Gunther, Catalogue, 



V, 1864, 121 (Demerara; Surinam). 

 Pimelodus musculus Muller and Troschel, Horse Ichth., Ill, 1849, 4 (America). 

 Pimelodus mulleri Gunther, Catalogue, V, 1864, 119 (River Capin; Para; Surinam). 

 Rhamdia queleni Bleeker (not of Quoy and Gaimard), " Silures de Suriname," 



1864, 75 (Surinam). 



Twenty-nine specimens, 96-246 mm. Mud creek in Aruka River. (C. M. 

 Cat. No. 1588a-e; I. U. Cat. No. 11194.) 



One specimen, 119 mm. Below Packeoo Falls, Essequibo. (C. M. Cat. No. 

 1589a.) 



Seven specimens, 118-226 mm. Creek in Barima River. (C. M. Cat. No. 

 1590a-6; I. U. Cat. No. 11995.) 



Five specimens, 150-280 mm. Creek in Mora Passage. (C. M. Cat. No. 

 1591o-6; I. U. Cat. No. 11996.) 



Fourteen specimens, 129-228 mm. Gluck Island, Rockstone. (C. M. Cat. 

 No. 1592a-e; I. U. Cat. No. 11997.) 



One specimen, 153 mm. Kumaka. (C. M. Cat. No. 1593.) 



One specimen, 294 mm. Lama Stop-Off . (I. U. Cat, No. 11998.) 



One specimen, 200 mm. Georgetown, mud-flats. (C. M. Cat. No. 1601.) 



One specimen, 220 mm. Botanic Gardens. (C. M. Cat. No. 1602.) 



One specimen, 244 mm. Wismar. (C. M. Cat. No. 1603.) 



I have also examined the types of stegelichii in Berlin. 



Head 4-4.25; depth 3.3-5.16; D. 1,6; A. 10-12; eye in the middle or slightly 

 in advance of the middle of the head, 6-6.5 in the head in the adult, 2-2.5 in the 

 interorbital; maxillary barbel reaching beyond middle of adipose, to tip of caudal 

 in some young; post-mental barbels to tip of pectoral or beyond origin of ventral. 

 Dorsal spine somewhat longer than snout in adult (shorter in young) ; pectoral 

 spine somewhat longer than snout and eye in the adult; adipose fin nearly half the 



