266 Ona new Snake and two new Fishes from Brazil. 
of the snout, much shorter than the parietals ; one pre- and 
two postoculars ; temporals 1+1; six upper labials, second 
and third entering the eye, fifth largest ; four lower labials in 
contact with the anterior chin-shields, which equal the pos- 
terior in size. Scales in 15 rows. Ventrals 203; anal 
divided ; subcaudals 26. Cream-colour (in spirit), above 
with three black streaks, interrupted by the pale borders of 
the scales, the middle one on the vertebral row of scales, the 
lateral between the fourth and fifth rows (counting from the 
ventrals) ; a blackish transverse band on the base of the tail ; 
ventrals and subcaudals black antero-mesially. 
Total length 530 millim. ; tail 45. 
A single specimen, from the Camapuam-River district. 
Pimelodus (Pseudorhamdia) nigribarbis. 
Da Gp 4 Ave foe gi raliS: 
Head bony above, granulated; occipital process obtusely 
keeled, twice as long as broad, extending to the basal bone of 
the dorsal spine. Adipose fin one sixth of the total length 
(without caudal), about two thirds its distance from the dorsal 
fin. The maxillary barbel extends to the origin of the anal, 
the outer mandibular to the extremity of the pectoral. Length 
of head two sevenths of the total (without caudal) ; eye rather 
larger, a little nearer the end of the snout than the extremity 
of the opercle, its diameter once and a half in the length of 
the snout. Dorsal fin much higher than long, the spine 
strong, but little shorter than the anterior branched rays, 
measuring two thirds the length of the head. Pectoral spme 
a little longer than dorsal, serrated on both sides. Caudal 
fin deeply forked, with the lobes pointed, the upper being the 
longer. Upper parts and fins powdered with black, most 
closely on the ventrals and anals and on the barbels, which 
are almost black. 
Total length 155 millim. 
Two specimens, from the Camapuam River. 
Girardinus Lheringit. 
Di 9d CAO nN os lat. 28-30. Tb; transye8: 
Height of body about two sevenths of the total length 
(without caudal), length of head one fourth. Diameter of 
the eye exceeding the length of the snout, less than the width 
of the interorbital space. Origin of the dorsal above the 
middle of the anal in the female, a little nearer the end of the 
