276 Mk. C. TATE REGAN ON THE 
3. LORICARIA PARVA, 
Loricaria parva Bouleng. Proc. Zool. Soc. 1895, p. 527, and Trans. Zool. Soc. xiv. 1896, pl. viii. 
fig. 1. 
Length of head about 5 times in the total Jength. Breadth of head nearly 14 times 
in its length, diameter of eye about 64 times, interorbital width 3-34 times, length of 
snout twice. Snout rounded anteriorly. Supraorbital edges slightly raised, head other- 
wise evenly convex, without keels or ridges; orbit with a broad rounded notch ; lips 
papillose, with short marginal fringes, the lower of moderate width, slightly emarginate ; 
free portion of barbel a little longer than the diameter of eye; teeth well developed, 
about 8 on each side in both jaws. 28-29 scutes in a longitudinal series, 13-15+ 
15-16, the lateral keels united posteriorly, the scutes in front of the dorsal not, or very 
indistinctly, carinate. Lower surface of head naked; abdomen with 3 series of plates 
between the lateral series, anteriorly some smaller plates to the level of the inner 
angle of the gill-openings ; an anal plate bordered anteriorly by 3, these 3 again by 5. 
First dorsal ray 1}-12 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 usually more or less 
produced ; outer caudal rays elongate. Breadth of body at level of first anal ray 43-5 
times in the distance from that point to the caudal. Back with 6 dark cross-bands; a 
black stripe on each side of the snout running forward from the eye; all the fins with 
dark spots on the rays ; dark spots on membrane at base of dorsal, pectorals, ventrals, 
and caudal ; caudal with a more or less distinct blackish marginal or intramarginal 
band. 
Total length 100 mm. 
Eight specimens: Descalvados, Matto Grosso, Paraguay System. 
4, LoRICARIA PHOXOCEPHALA. 
Loricaria phoxocephala Kigenm, & Kigenm. Proc. Cal. Ac. (2) ii. 1889, p. 37, and Oce. Pap. Cal. 
Ac. i. 1890, p. 373. : 
Length of head 42-5 times in the total length. Breadth of head 13-1} (young) times 
in its length, diameter of eye 6-7 times, interorbital width 3% times, length of snout 
15-2 times. Snout triangular, pointed ; supraorbital edges not or slightly raised ; supra- 
occipital with a pair of very indistinct keels; head otherwise evenly convex, without 
keels or ridges. Orbit with a broad rounded notch ; lips papillose, with short marginal 
fringes, the lower of moderate width; free portion of barbel a little longer than the 
diameter of eye ; teeth well developed, 9 or 10 on each side in both jaws. 29 scutes 
in a longitudinal series, 144-15, the lateral keels weak, united posteriorly, all the scutes 
in front of the dorsal weakly carinate. Lower surface of head naked; abdomen with 
3 series of plates between the lateral series ; anteriorly some smaller plates to the level 
