18 ON THE SPECIES OF THE GENUS ANOSTOMUS. 



(13), A. 11, L.I. 45, L. tr. _!_. Between the lateral 



v '' ' 5(7) 



line and the first ray of the dorsal there are six series, and 

 between the line and that of 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. 



( Schizodontopsis* ) 

 ANOSTOMUS T^ENIATUS 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 the median 

 series of the belly. One specimen, from Lake Hyanuary, 

 has but four series between the line and the veutrals ; 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. 



