290 MR. C. TATE REGAN ON THE 
27. LORICARIA EVANSII, 
Loricaria evansii Bouleng. Ann. Mag. Nat. Hist. (6) x. 1892, p. 10, pl. i. 
Length of head 4 times in the total length. Breadth of head 1} times in its length, 
diameter of eye 7 times, interorbital width 4+ times, length of snout 14 times. Head 
rough, snout pointed, its sides armed with strong bristles (in the male); supraoccipital 
with a single serrated keel; orbit with a broad shallow notch; lips covered with short 
filiform papilla, margined with rather long fringes; lower lip emarginate; barbels 
extending nearly to gill-opening; teeth strong, + on each side in both jaws. 31 scutes 
in a longitudinal series, 19+ 12, all in front of the dorsal carinate, the lateral keels 
strong and separate throughout. Lower surface of head naked; abdomen with a 
lateral series of 8 plates on each side, otherwise naked, except for numerous small 
disconnected granules. First dorsal ray 2 the length of head. Pectoral spine 
extending to anterior { of ventral; ventral rays increasing in length from the inner- 
most outwards; upper ray of caudal very elongate. Breadth of body at level of first 
anal ray 34 times in the distance from that point to the caudal. Back with 4 or 5 
dark cross-bands ; fins with dark spots or bars. 
‘Total length 208 mm. 
One specimen: Rio Jungada, Matto Grosso, 
28. LoricaRIA NUDIVENTRIS. 
Loricaria nudiventris Cuv. & Val. Hist. Nat. Poiss. xv. p. 469 (1840). 
Closely allied to the preceding species. Head very rough, but without movable 
bristles, its length 3% times in the total length, its breadth about 1} times in its length. 
Diameter of eye about 7} times in the length of head, interorbital width 4} times, 
length of snout 1} times; supraoccipital with an obtuse median ridge. 32 scutes in a 
longitudinal series, 21-+-11, the keels somewhat weaker than in L. evansii. Abdomen 
naked, except for a lateral series of 4 plates on each side. em 
‘otal length 220 mm. 
One specimen (type of the species): Rio San Francisco, Brazil. 
29. Loricania MAcRops, sp. n. (Plate XVII. fig. 3.) 
Length of head 444% times in the total length. Breadth of head 1) times in its 
length, diameter of eye 5$-64 times, interorbital width 54 times, length of snout twice. 
Snout pointed; supraoccipital with a pair of serrated keels; orbit with a broad shallow 
notch; lips covered with short tentacle-like papille ; lower lip emarginate, with long 
marginal fringes; barbel extending nearly to outer angle of gill-cleft ; teeth moderately 
strong, about 12 on each side in both jaws. 36-37 scutes in a longitudinal series, 
23 +13-14, all in front of the dorsal carinate, the lateral keels strong and remaining 
separate throughout. Lower surface of head naked; abdomen with 4 or 5 irregular 
