298 MR. C. TATE REGAN ON THE 
(in a specimen of 230 mm.). Scutes 20+16 in a longitudinal 
BEQiCa sn. ou) 90. ee ere ee : » + 4 « 5 »« & O. guentheri Ren. 
Length of snout 14 times in that of tie eke aide of eye 94 times 
(in a specimen of 250 mm.). Scutes 18+15 in a longitudinal 
series . . eam 7 mie : coh «os; van tek (Ont Os DOMA Te eenEe 
Length of snout 7 times in that of he head, ‘Saaikdite of eye 11 times 
(in a specimen of 250 mm.). Scutes 20-21+16 in a longitudinal 
series. . aac - . . 6. O. lyra Rgn. 
Length of snout pnd 14 times in Hen of she hess sce fes of eye 
about 8 times (in a specimen of 240 mm.). Scutes ? + 10-13 in 
a longitudinal series . . . + Od Gamer ed ie Obs Rei dipiisein ee 
Scutes 14-16+16-18 in a ioneitadicaln Beries!, Geege! i) os LO. (O renaiaeb ler 
B. Pectoral spine extending nearly to middle of ventral, or beyond. 
Breadth of body at level of last anal ray about 4 times in the distance 
from the latter to the candal . . ... ; 8. O. barbata Kner. 
Breadth of body at level of last anal ray about 7 times in hike aittanen 
from the latter tothe caudal . . . . . . . =.=. =. © « Q. O. panamensis Kigmn. 
J. OXYLORICARIA LORICARIIFORMIS. 
Harttia loricariiformis Steind. Sitzb. Ak. Wien, lxxiv. pt. 1, 1876, p. 668; Eigenm. & Eigenm. 
Proe. Cal. Ac. (2) 11. 1889, p. 39, aud Occ. Pap. Cal. Ac. i. 1890, p. 386. 
Length of head 3% times in the total length. Head about as broad as long and 
25 times as long as deep. Diameter of eye 7 times in the length of head, interorbital 
width 33 times, length of snout 14 times. Snout rounded ; supraorbital edges not 
raised. 29 scutes in a longitudinal series, 24+5, none of the scutes distinctly 
carinate. Lower surface of head naked except for a granular plate in front of 
each gill-cleft; abdomen naked except for the lateral series of plates and a pair 
of rather large anal plates. First dorsal ray nearly as long as the head; pectoral 
spine extending a little beyond base of ventral; caudal slightly emarginate. Fins 
with dark spots. 
Total length 155 mm. 
One specimen: South-eastern Brazil. 
2. OXYLORICARIA PLATYSTOMA. 
Loricaria platystoma Giinth. Proc. Zool. Soc. 1868, p. 236, figs. 4 & 5. 
Length of head 5 times in the total length. Head about 1} times as long as broad 
and 24 times as long as deep. Diameter of eye 6 times in the length of head, 
interorbital width 4 times, length of snout 13-14 times. Snout pointed; supraorbital 
edges slightly raised. 29-30 scutes ina eendinal series, 20-21+48-9, the lateral 
