622 Mr. C. T. Regan on 
eye. Maxillary more than half the length of head. 
Sc. 56/13. D.11. A. 65. Distance from origin of dorsal 
to base of caudal 12 times in that from tip of snout to origin 
of dorsal. Pectoral longer than the head. Dark above, 
silvery on sides and below. 
Total length 226 mm. 
A single specimen from the Rio Vaqueria, N.W. Ecuador. 
This species is distinguished from P. Dovit, Gthr., its 
nearest ally, by the larger mouth and more numerous anal 
rays. 
Ophichthys (Pisodontophis) brevimanus. 
Depth of body about 21 times in the total length, length 
of lead about 8} times. Anal opening equidistant from tip 
of snout and posterior end of body. Diameter of eye 16 
times in the length of head and 22 times in the length of 
snout, which is 12 times the distance from eye to posterior 
angle of mouth. aie eeth granular. Dorsal commencing above 
tip of pectoral, which is “short, its length 95 times in that of 
the head. Dark bluish grey above, lighter below ; numerous 
dark spots on the head; dorsal dark, with a narrow light 
margin; anal light. 
‘Total length 630 mm. 
A single specimen from the Rio Vaqueria, near La Tola, 
N.W. Devedon. 
Piabucina astrigata. 
Depth of body 43-5 times in the total length, length of 
head about 43 times. Snout as long as the eye, the diameter 
of which is 43-53 times in the length of head, interorbital 
width 24-23 times. Maxillary extending to below middle of 
even mandibular rami well separated, the interspace some- 
what narrowed anteriorly, but not tapering to a point. 
Sc. 28-29/8. D. IL 8, its origin nearly equidistant from thie 
posterior edge of the postorbitals and the base of caudal. 
A.J19. Pectoral 2-2 the length of head. Ventrals ex- 
tending a little more than half the distance from their base 
to the origin of anal (in the aduit) or nearly 2 of that distance 
(in the young). Caudal bilobed. Caudal pedunele 12-1} 
times as long as deep. Olivaceous above, lighter below. A 
dark spot on the base of caudal. In the young a series of 
large dark spots along the middle of the side, most conspicuous 
posteriorly. 
Total length 185 millim. 
Five specimens from St. Javier, Paramba and the Rio 
Sapayo, N.W. lcuador. 
