246 MEMOIRS OF THE CARNEGIE MUSEUM 



rounded or the rays graduate, reaching to or a little beyond the origin of the anal. 

 Dorsal spine equal to distance from snout to upper angle of gill-opening. 



Five or six cross-bands, the first extending down and forward from the third 

 and fourth dorsal rays, the second being a large spot on the sides a little in front 

 of the tip of the dorsal; dorsal spotted, most conspicuously so at its tip; pectorals 

 dusky, or faintly spotted; ventrals a little lighter; anal hyaline; caudal faintly 

 spotted, the tip of the lower lobe black. Upper caudal ray scarcely produced. 



111. Loricariichthys griseus (Eigenmann). (Plate XXX, fig. 2; Plate 



XXXII, fig. 2.) 

 Loricaria griseus Eigenmann, Ann. Carnegie Mus., VII, 1910, 8; Repts. Princeton 



Univ. Exp. Patagonia, III, 1910, 414. 



Type, 131 mm. over all, 118 to tip of middle caudal rays. Konawaruk. 

 (Carnegie Museum Catalog of Fishes No. 1504.) 



Cotypes, eleven specimens, 36-108 mm. to base of middle caudal ray. 

 Konawaruk. (C. M. Cat. No. 1505a-c; I. U. Cat. No. 11926.) 



Cotypes, twenty-two specimens, 49-119 mm. to base of middle caudal ray. 

 Bartica sand-bank. (C. M. Cat. No. 1506a-e; I. U. Cat. No. 11927.) 



Allied to L. punctaius and L. maculatus. 



Head 4.5-5; width of head 1.4-1.5 in its length; eye 5; interorbital 6.5-7; 

 snout 2 in the head; width at first anal ray 5-5.33 in its distance from the cau- 

 dal; scutes 18 or 19 + 11, the lateral keels remaining separate throughout. 



Upper lip well-developed, thickly papillose in the types, and always margined 

 with well-developed tentacles, which are shortest, or absent, at the center. Lower 

 lip in the type very broad, extending to the middle of the opercle, everywhere 

 minutely warty, with a few larger warts on its anterior half, emarginate, otherwise 

 with the edge smooth; lips ordinarily much narrower, not much wider than the 

 part with larger warts, deeply emarginate, and the edge with minute tentacles; 

 free portion of the barbel scarcely half the length of the eye. 



Teeth minute, about six to eight on each side of the upper jaw and twelve on 

 each side of the lower, those of the upper jaw much smaller than the largest of the 

 lower jaw. 



Head without ridges, an obscure groove on the occipital, sometimes continued 

 in the first or first two nuchal plates; orbital notch broad and shallow, rounded, 

 not encroaching on the interorbital; lower surface of the head naked; plates of 

 the body without keels or ridges; anal plate normally bordered by three plates, 

 but sometimes by four or five; two to four series of plates between the lateral plates 



