18 ON THE SPECIES OF THE GENUS ANOSTOMUS. 
(13), A. 11, L.l. 45, L. tr. J^. Between the lateral 
line and the lirst ray of the dorsal there are six series, and 
between the line and tliatof the ventral but five entire series, 
or seven between the line and the median row of the belly. 
The depth of the body is three and three-fourths, and the 
length of the head four and one-fourth times in the total 
length, excluding the caudal. In the length of the head 
the diameter of the eye is contained four and one-half 
times. The fifth, or the sixth, ray of the dorsal is over the 
middle of the length of the body. A spot is present on 
the flank below the dorsal, another is seen at the base of 
the caudal, and there are faint indications of narrow trans- 
verse bands on the back, from the occiput to the end of 
the dorsal fin. Opercle unspotted. 
( 8chizodontopsis, ) 
Anostomus t^niatus Kn. ; Gth. 
In all the species of this group the mouth opens obliquely 
upward and forward, the snout is broad in front of the 
eyes, and the teeth of the lower jaws are truncate or nearly 
entire on their cutting edges. On this species there are 
five series of scales between the lateral line and the dorsal, 
and four from the line to the ventral or five to tlie median 
series of the belly. One specimen, from Lake Hyanuary, 
has but four series between the line and the ventrals ; in 
other respects it is normal and agrees with its fellows of 
the same locality. There are eight rays of the dorsal in 
front of the middle of the body. Depth of body and length 
of head are equal and each is contained four and three- 
fourths times in the length of the body. 
Numerous examples from Cudajas, Iga, Jutahy, Lago 
Alexo, Lake Hyanuary, and Lake Saraca. 
