26 
Indiana University Studies 
pectoral spine 2 to 2.2 ; mandibular ramus 2.6 times in the in- 
terorbital width ; snout depressed, the interorbital region flat, 
supraoccipital bordered posteriorly by a single scute and one 
on each side; the disc of mouth rounded, the lower lip finely 
papillose; 34 scutes in a lateral series, 7 between the supra- 
occipital and origin of the dorsal, 23 between the anal and the 
caudal ; abdomen with a median series of plates, 13 or 14 be- 
tween the ventrals and the mouth; dorsal fin obliquely trun- 
cate, its origin nearer to the tip of the snout than to the base 
of the caudal by the length of the anal spine; pectorals ex- 
tending to the base of the ventrals; ventrals not near reach- 
ing the anal; the caudal deeply emarginate, the outer rays 
prolonged into a thread. 
A narrow naked line down the back from the supraoccipital 
to the plate in front of the dorsal and continuing from the 
base of the dorsal to the base of the caudal, a similar line 
from the base of the anal to the caudal. The dorsal rays with 
alternating dark and light areas most distinct on the second 
ray; interradial membrane unmarked; pectoral, ventral, and 
anal fins have indistinct markings similar to the dorsal; the 
outer rays of the caudal fin black, sometimes small vertical 
light areas alternate with the black. 
Order HETEROGNATHI. 
Family Characid^e. 
Subfamily curimatin^e. 
Curimatopsis macrolepis Steindachner. 
17279, 1, 35 mm., Lagoons, Lake Rogoagua. Nov., 1921. 
17280, 3, 29-40 mm., Lagoons near Reyes. Oct., 1921. 
17281, 17, 24-28 mm., Cachuela Esperanza. Mar., 1922. 
Curimatopsis microlepis Eigenmann & Eigenmann. 
17282, 1, 32 mm., Cachuela Esperanza. Mar., 1922. 
In the absence of specimens for comparison I am not sure 
of the identification. They may be the juvenile form of a 
Curimatus. 
Curimatus spilurus Gunther. 
17283, 2, 42 and 68 mm., Lagoons, Lake Rogoagua. Nov., 1921. 
17284, 10, 34-60 mm., Reyes. Nov., 1921. 
