280 MR. C. TATE REGAN ON THE 
7 
the caudal. Back with 5 obscure dark cross-bands, the first through the base of the 
dorsal; head and anterior part of body with small blackish spots; all the fins with dark 
spots on the rays; caudal blackish at the base and in its posterior half. 
‘Total length 95 mm. 
One specimen: R. Cadea; Rio Grande do Sul. 
10. LorIcARIA TEFFEANA. 
Loricaria teffeana Steind. Denkschr. Ak. Wien, xli. 1879, p. 44, pl. vi. fig. 2; Eigenm. & Eigenm. 
Proc. Cal. Ac. (2) ii. 1889, p. 39, and Occ. Pap. Cal. Ac. i. 1890, p. 379. 
Length of head 52 times in the total length. Breadth of head 14 times in its 
length, diameter of eye 6} times, interorbital width 42 times, length of snout 2} times. 
Snout triangular, pointed; supraorbital edges slightly raised; supraoccipital with or 
without a pair of indistinct keels; head otherwise evenly convex, without keels or. 
ridges. Orbit with a large notch; lips papillose, with short marginal fringes; free 
portion of barbel nearly equal to the diameter of eye; teeth well developed, 8-10 on 
each side in both jaws. 30-31 scutes in a longitudinal series, 14-15+15-16, the 
lateral keels weak, united posteriorly; scutes in front of the dorsal with very weak 
keels. Lower surface of head naked; abdomen with 3 series of plates between the 
lateral series ; anteriorly some smaller plates extending forward to the level of the inner 
angle of the gill-opening; an anal plate, bordered anteriorly by 3, these 3 again by 5. 
First dorsal ray 14 times the length of head; pectoral spine extending to anterior § of 
ventral ; ventral rays increasing in length from the innermost outwards; outer (spinous) 
rays of pectoral and ventral and anterior ray of dorsal a little produced; upper caudal 
ray elongate. Breadth of body at level of first anal ray nearly 6 times in the distance 
from that point to the caudal. Back with 6 dark cross-bands, the first through the base 
of the dorsal; dorsal with dark spots on the rays; caudal blackish at the base and in 
its posterior half. 
Total length 155 mm. 
One specimen: R,. Amazon. 
11. LoricariA CATAMARCENSIS, 
Loricaria catamarcensis Berg, An. Mus. Buenos Aires, iy. 1895, p. 137. 
Length of head 44344 times in the total length. Breadth of head 12-1} times in 
its length, diameter of eye 6-7 times, interorbital width about 4 times, length of snout 
2-21 times. Supraorbital edges slightly raised ; orbit with a well-developed triangular 
notch ; supraoccipital with a pair of well-separated obtuse keels; lips papillose, with 
short marginal fringes ; lower lip of moderate breadth, rounded ; free portion of barbel 
not longer than diameter of eye ; jaws with about 8 teeth on each side. 28-29 scutes 
in a longitudinal series, 15-16 + 12-13, all the scutes in front of the dorsal carinate, the 
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