EIGENMANN: the freshwater fishes of BRITISH GUIANA 247 



of the belly; anterior border of the ventral armature on a Une with the gill-open- 

 ings, truncate or emarginate through the development of minute plates on the 

 side in front. 



Pectoral truncate when half expanded, emarginate when depressed, the spine 

 not i)rolonged, reaching second fourth of the ventrals. Ventrals usually rounded 

 or truncate, scarcely reaching the anal; in a few of the Bartica specimens the in- 

 ner rays are prolonged, reaching to near the fourth anal ray; upper caudal ray in 

 a well-preserved specimen 2.5 times the length of the middle ray. 



Sand-colored, with the back everywhere spotted; very obscure cross-bars; 

 dorsal, pectoral, and more obscurely the ventral colored like the back; upper 

 part of caudal with cross-bars, tip of lower caudal lobe blackish; arial hyaline. 



112. Loricariichthys brunneus (Hancock). (Plate XXX, fig. 3; Plate 



XXXI, fig. 4.) 

 Loricaria brunnea Hancock, Zool. Journ., IV, 1828, 247 (Demerara). — Cuvier 



and Valenciennes, Hist. Nat. Poiss., XV, 1840, 479 (copied). — GtJNTHER, 



Catalogue, V, 1864, 260 (copied). — Eigenmann and Eigenmann, Occasional 



Papers Cal. Acad. Sci., I, 1890, 370. — Eigenmann, Repts. Princeton Univ. 



Exp. Patagonia, III, 1910, 415. 



Hancock's species of Loricaria from Demerara described as having a single 

 series of plates along the ventral surface is undoubtedly the common Loricariu of 

 that locality. There are several (about three) series of plates between the lateral 

 plates of the belly, but these are so united and attached to the lateral series that 

 they give the impression of a continuous plate extending entirely across the belly. 



Twelve specimens, 68-136 mm. to end of shortest caudal ray. Lama Stop- 

 Off. (C. M. Cat. No. 1491a-d; I. U. Cat. No. 11928.) 



Seven specimens, 60-124 mm. Maduni Creek. (C. M. Cat. No. 1492a-&; 

 I. U. Cat. No. 11929.) 



One specimen, 90 mm. Botanic Garden. (C. M. Cat. No. 1493a.) 



Six specimens, 68-110 mm. Demerara River below Wismar. (C. M. Cat. 

 No. 1494a-6; I. U. Cat. No. 11930.) 



Two specimens, 76-105 mm. Christianburg Canal. (C. M. Cat. No. 1495a; 

 I. U. Cat. No. 11931.) 



One specimen, 108 mm. Wismar. (C. M. Cat. No. 1496a.) 



Two specimens, 77-118 mm. Kumaka, Demerara. (C. M. Cat. No. 1497a; 

 I. U. Cat. No. 11932.) 



Two specimens, 103-112 mm. INIalali. (C. M. Cat. No. 1498a; I. U. Cat- 

 No. 11933.) 



