1878.) 697 Gene: 
118. AcaRa HYPOSTICTA, sp. NOV. 
Radii; D. XIII 19; A III 153. Scales 6—30-3—17-8 ; six rows on cheek. 
The ventral fins commence under the third dorsal spine. The longest 
(fourth) dorsal spine is equal to the diameter of the bony orbit, which 
nearly equals the flat interorbital space. The preorbital bone is as long 
antero-posteriorly as one-third the diameter of the orbit, which is one-third 
the length of the head, exceeding a little the length of the muzzle. The 
extremity of the maxillary bone extends a little beyond the line of the an- 
terior border of the orbit. 
The form is a moderately wide oval, with the profile from the base of the 
dorsal fin a perfectly straight line to the end of the muzzle. The depth at 
the ventral fins enters the length less the caudal 2.1 times, and the length 
of the head enters the same 2.6 times. Total length M. ,095 ; of head, .027 ; 
to origin ventrals, .031 ; of anal, .049 ; of caudal, .070. 
The single specimen in my possession is in rather bad condition. It is 
of a light brown color, the dorsal, caudal and anal fins with brown spots. 
The ventrals are cross-banded with deep brown; and anterior to them, 
five similar bands, separated by silvery interspaces, cross the inferior sur- 
face, the anterior three of which rise to the superior border of the inferior 
ramusof the preoperculum. A brown horizontal line extends posteriorly 
from the mouth. 
The soft radii of the median fins are more numerous in this than in any 
of the described species. This character, with the peculiar coloration, 
will distinguish it from all of them. 
Coll. of 1878. 
114. AcARA OCELLATA Agass. (Steind.) Hygrogonus Gthr. 
Coll. 1877. 
115. GropHacus cuPprpo Heck. 
116. GEOPHAGUS T#NIATUS Gthr. 
Two specimens; one of which exhibits a deep brown band along the 
middle line of the abdomen, which is wanting in the other. 
A third species from Pebas, the Geophagus badiipinnis Cope, is thought 
by Dr. Steindachner to be a Chetobranchus. It has, however, the branch- 
ial structure of the genus to which I referred it. 
117. CrcHLA OCELLARIS Bl. 
Probably Nauta 1873. 
118. CrENnicIcHLA PROTEUS Cope, Proceed. Acad., Phila. 1872, p. 252. 
Coll. 1877. 
119. CRENICICHLA Lucius Cope, Proceed. Amer. Philos. Soc., 1870, p. 570. 
Coll. 1873. From the Cachyiacu, an affluent of the Huallaga, near 
Moyabamba, 
120. CRENICICHLA JOANNA Heck. 
Coll. 1877. ; 
PROC. AMER. PHILOS. soc. xvit. 101. 41. PRINTED JUNE, 1878, 
