© 
Cope. ] 696 [May 17, 
rivers of Brazil, and not to occur in the valley of the Amazon. I cannot 
distinguish my Peruvian specimens from the descriptions furnished by 
him and by Dr. Giinther. 
Coll. 1877. 
109. Heros BIMACULATUS Linn. Cope; Acara Gthr. 
Coll. 1873-77. 
110. AcARA FLAVILABRIS Cope, Proceed. Amer. Philos. Soc, 1870, p. 570. 
Proceed. Acad. Phila. 1872, PI. XI, fig. 4. 
Dr. Steindachner in the Sitzungsberichte of the Vienna Academy for 
1875, p. 6 (separata), expresses the opinion that this species is the A. fetra- 
merus Heck., basing it on a presumed error on my part in the counting of 
the scales on the cheek. He finds my figure above cited to disagree with 
my last description, in possession of three rows of cheek scales while I have 
stated that only two exist. An examination of numerous specimens addi- 
tional to those already in my possession, shows that they only exhibit two 
rows of cheek scales as I have described. Dr. Steindachner has evidently 
misunderstood my figure, for there are but two rows of cheek scales repre- 
sented on it as described. The third row belongs to the inferior limb of the 
peroperculum. The figure only is defective in the dark shading of the in- 
ferior lip, which is yellow in life. 
Coll. 1873. 
111. Acara sysprius Cope, Proceed. Ac. Phila. 1872, p. 255, Pl. XI, fig. 3. 
In a larger specimen of this species than the type, the body is relatively 
deeper, and the eye a little smaller, and the vertical bands are less decided. 
Coll. 1877. 
112. ACARA SUBOCULARIS, sp. nov. 
Radii D. XIII, 11; A. III, 8; V. I. 5, nearly reaching vent, and origi- 
nating below the fourth dorsal spine. . Scales 8—30-2—8-9 ; on cheek five 
rows. Form rather elongate; head not robust, its length entering the 
total less the caudal fin 3.4 times. The depth at the ventral fin enters the 
same 2.75 times. The preorbital bone is as wide antero-posteriorly as the 
orbit, and exceed the interorbital space by 1 mm. The orbit is thus behind 
the middle of the head, into whose length it enters 3.6 times. Its superior 
rim is in the frontal plane. The fourth and longest dorsal spine is as long 
as the cranium from the superior extremity of the branchial fissure to the 
anterior border of the orbit. The profile descends from the supra-occipital 
crest in a nearly straight line, with a slight concavity at the front of the 
orbit. 
Color light brown, with a narrow vertical black spot just below the lat- 
eral line opposite the middle of the ventral fin. A black spot on the upper 
anterior portion of the spinous dorsal fin. A vertical black band from the 
eye to the inferior edge of the preoperculum. 
Total length M. .075; of head .017; to basis of ventrals (axial) .022; to 
basis of anal .039 ; of caudal .058 ; depth .021. 
This species resembles the Geophagus cupido. 
Coll. of 1877. 
