292 MR. C. TATE REGAN ON THE 
31. LoricaRiA CARINATA. 
Loricaria carinata Casteln. Anim. Am. Sud, p. 46, pl. xxiii. fig. 3 (1855). 
Loricaria lata Kigenm. & Eigenm. Proc. Cal. Ac. (2) ii. 1889, p. 36, and Oce. Pap. Cal. Ac. i. 
1890, p. 384. 
Closely allied to L. cataphracta, differing in the broader head and body and smaller 
eye. Head about 1} times as long as broad ; diameter of eye 6-8 times in the length 
of head. 33-35 scutes in a longitudinal series, 18-22-+-11-16. Breadth of body at 
level of first anal ray 4-42 times in the distance from that point to the caudal. 
Olivaceous ; back with 5 dark cross-bands (in the young), which disappear in the adult ; 
dorsal, pectoral, and ventral fins with dark spots in the young, uniformly blackish in 
the adult ; caudal with a dark posterior margin and dark spots on the rays. 
Total length 245 mm. 
Hight specimens (including the type of the species): R. Jurua; R. Paraguay ; 
Matto Grosso; Goyaz. 
32. LoRICARIA SIMILLIMA, sp. n. (Plate XVII. fig. 2.) 
Length of head 5 times in the total length. Breadth of head about 14 times in its 
length, diameter of eye 63-7 times, interorbital width 5} times, length of snout twice. 
Lower surface of head naked, except for a patch of small granular plates on each side 
in front of the gill-opening ; abdominal plates extending forward to the level of the 
inner angle of the gill-opening, or beyond; lower lip broad, entirely covering the naked 
part of the head. 34 scutes ina longitudinal series, 20+14. First dorsal ray 14 times 
the length of head. Breadth of body at level of first anal ray 44-41 times in the 
distance from that point to the caudal. Olivaceous; fins, except the anal, with dark 
spots or blotches or uniformly blackish. In other characters similar to L. cataphracta. 
Total length 175 mm. 
Three specimens from Canelos, E. Ecuador, collected by Mr. C. Buckley, referred 
by Boulenger to Z. filamentosa in his account of the Buckley Collection. 
33. LORICARIA APELTOGASTER. 
Loricaria apeltogaster Bouleng. Proc. Zool. Soc. 1895, p. 528, and Trans. Zool. Soc. xiv. 1896, 
p. 33, pl. vil. fig. 2. 
Length of head 44-5 times in the total length. Breadth of head 1§—1} times in 
its length, diameter of eye 8-8} times, interorbital width 5-55 times, length of snout 
1$-2 times. 33-34 scutes in a longitudinal series, 18-21+13-15. Abdomen naked 
or with very small granular plates, which are stronger and larger between the pectorals 
and again posteriorly than in the middle region; in addition the usual lateral series of 
plates. First dorsal ray a little more or a little less than the length of head; pectoral 
spine extending to anterior 4 of ventral in one specimen (the smallest), to well beyond 
