226 PROCEEDINGS OE THE SCIENTIFIC ASSOCIATION. 
rally a black •white- edged ocellus on the upper part of the 
root of the caudal. D. 8, A. 16, V. 6, L. lat. 36. 
This species appears to occur also in Venezuela, and even 
in the Rio Negro, The specimens examined are l.J inch 
long. 
Girardinus G-uppii (Gthr.) 
The height of the body is two-sevenths of the total length 
(without caudal), the length of the head nearly one-fourth, 
males rather more slender. The diameter of the eye is 
more than the length of the snout, not quite one-third of 
that of the head, and three-fifths of the width of the inter- 
orbital space, which is flat. In both sexes the origin of 
the dorsal fin is somewhat nearer to the extremity of the 
snout than to that of the caudal, and in the female it is 
opposite to the origin of the anal. Caudal fin large, rather 
longer than the head, obtusely rounded behind. The free 
portion of the tail is somewhat elongate, the length of the 
base of the anal being one-third of its distance from the 
-caudal. Pectoral fin as long as the head, not extending so 
far backwards as the ventral fins, which reach the origin of 
the anal. D. 7-8, A. 8-9, V. 5, L. lat. 26-28. 
In the male the anal fin is advanced to between the ven- 
trals, which are elongate. The anal process, formed by two 
or three rays, is as long as the head and without hooks. 
The feynale is yellowish olive, with the belly silvery, and 
with the trunk above the belly blackish ; all the scales 
with a narrow blackish edge. 
The male is conspicuously marked": two brown streaks 
run along the trunk and are sometimes confluent into a 
band, one brown streak runs along the middle of the side 
of the tail, a round black spot behind the shoulder, ano- 
