2s8 Field Museum of Natural History — Zoology, Vol. X. 



to reach gill-opening; temporal and occipital plates and predorsal scutes 

 carinate; sides anteriorly with 3 keels, the upper one present on 8th or 9th 

 scute, the second and third coming very close together, but not com- 

 pletely united, on the i6th to the 18th scute; ventral surface of head 

 naked; abdomen completely armed, with a series of broad plates on 

 each side and two narrower median rows; a naked area behind base of 

 pectorals; vent anteriorly bordered by a single plate, which in turn is 

 anteriorly again bordered by 3 or 4 smaller plates; 16 to 18 scutes from 

 anal to base of caudal; origin of dorsal over base of ventrals; the anterior 

 rays of dorsal reaching equidistant or slightly past the posterior rays when 

 deflexed, the spine a little longer than the head; caudal fin with rather 

 deeply concave margin, the upper spine produced in a filament; anal fin 

 small, its margin convex, the anterior rays the longest, longer than width 

 of head; ventral fins reaching well past origin of anal; pectoral fins of 

 about the same length as the ventrals, reaching well past the base of 

 the latter, 1.25 to 1.4 in head. 



Color dark grayish brown above, slightly lighter below. The fins 

 usually with dark spots on all of the rays. 



This species is represented by 19 specimens, ranging from 265 to 355 

 mm. in length. 



We have at hand the paratypes of this species with which we find 

 our specimens to be identical. 



Habitat : Rio Tuyra and Rio Atrato basins. 



14. Loricaria variegata Steindachner. 



Loricaria variegata Steindachner, Denkschr. K. Ak. Wiss. Wein, XLI, 



1879, 163, PI. HI (Rio Mamoni, near Chepo, Panama); Eigen- 



mann & Eigenmann, Proc. Cal. Ac. Sci., 2nd Ser., H, 1889, 36; 



Eigenmann & Eigenmann, Occ. Pap. Cal. Ac. Sci., 1890, 382. 



Head 4.45 to 4.95; depth 12 to 14; D, I, 7; A. I, 5; lateral scutes 32 

 or 33. 



Body much depressed throughout; head low and broad; snout rather 

 acute, granulate to the margin, its length 1.75 to 2 in head; orbital 

 notch distinct; eye 8.65 to 10.7 in head; interorbital 5.2 to 6; mouth 

 narrow; upper jaw with only 3 or 4 teeth on each side, lower jaw with 

 about 6 on each side; the lips papillose, with long fringes, the outer 

 fringe or barbel of lower lip reaching to or past gill-opening; temporal 

 and occipital plates, and predorsal scutes carinate; sides anteriorly with 

 2 keels, becoming united on the 14th or 15th scute; ventral surface of 

 head naked; abdomen with a lateral series of scutes, bordered by a 

 naked area, and then with a median row of quadrate, granular plates 

 anteriorly, increased to 2 or 3 rows in advance of vent, which is bordered 



