490 MEMOIRS OF THE CARNEGIE MUSEUM 



Mquidens vittata Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 



472. 



Four specimens, 58-120 mm. Wismar. (C. M. Cat. No. 2386a-6; I. U. 

 Cat. No. 12524.) 



Nine specimens, 70-160 mm. Malali. (C. M. Cat. No. 2387a-e; I. U. Cat. 

 No. 12525.) 



Fifty-one specimens, 33-88 mm. Lama Stop-Off. (C. M. Cat. No. 2388a-e; 

 I. U. Cat. No. 12526.) 



Ten specimens, 30-78 mm. Maduni Creek. (C. M. Cat. No. 2389a-e; I. U. 

 Cat. No. 12527.) 



Head 2.75-2.8; depth 2.2-2.33; D. XIII or XIV, 10 or 11 ; A. Ill, 7 or 8; lateral 

 line 10 + 10 + ":}; scales 24-26; eye 3.4 in the head, 1 in the preorbital, 1.66 in 

 the interorbital in the largest ; eye midway between upper angle of the gill-opening 

 and the anterior nares in the largest, in the middle of the head in the smaller 

 specimen. 



Elongate; dorsal and ventral profiles nearly equally arched; maxillary not 

 reaching the eye in the oldest; maxillary-premaxillary border 3 in the head. Lower 

 lip with a frenum. Five gill-rakers on the lower arch. Cheeks with four series 

 of scales; preopercle naked; one to one and one-half scales between the lateral line 

 and the dorsal; basal parts of the dorsal and anal naked, except in the old, when 

 there may be a scale on each membrane; lateral line usually not forked on the 

 caudal. 



Dorsal spines subequal from the fourth, the last spine half the length of the 

 head; caudal rounded, the outer rays sometimes projecting; dorsal and anal some- 

 times prolonged to the end of the caudal. Pectoral about as long as the head. 



Sides with about six faint cross-bars; a band from the eye to the base of the 

 last dorsal ray, intensified into a spot over the second cross-band; a spot at the 

 base of the upper caudal raj^; a dark streak forward and another downward from 

 the eye. 



333. .ffiquidens potaroensis sp. nov. (Plate LXVI, fig. 2.) 

 Type, 140 mm. Amatuk. (Carnegie Museum Catalog of Fishes No. 2407.) 

 Cotype, 140 mm. Potaro Landing. (C. M. Cat. No. 2390a.) 

 Cotypes, two specimens, 123-133 mm. Ireng River near Holmia. (C. M. 



Cat. No. 2391a; I. U. Cat. No. 12528.) 



Cotype, one specimen, 122 mm. Kangaruma. (C. M. Cat. No. 2392n.) 

 Cotypes, thirty-three specimens, 38-132 mm. Holmia. (C. M. Cat. No. 



2393a-e; I. U. Cat. No. 12529.) 



