1878.] 695 [Cope. 
five transverse series. The scales are lost from the anterior part of the 
body in two specimens, so that the number given is not absolutely certain, 
but very probable. Origin of dorsal fin immediately above that of ventral, 
and exactly half way between the base of the superior marginal ray of the 
caudal fin and the anterior border of the orbit. Pectoralsnot reaching the 
rather large ventrals, which fall considerably short of the anal. Head in 
total length less caudal fin, four and one-sixth times, and equal depth of 
body at dorsal fin. Eye large, its diameter entering length of head three 
times, exceeding muzzle by nearly half, and entering interorbital space 1-5 
times. Suborbital bones reaching pre- and interoperculum. The mandi- 
ble projects, and the maxillaries are very short and subdiscoid, closing into 
an external concavity at the base of eachramus. Color olivaceous, except a 
silver spot at the center of each scale. Fins unspotted, except the dor- 
sal, which has a large black spot over its middle portion, no black band on 
head, which is silvery on the sides. 
Coll. 1877. 
ISOSPONDYLI. 
OSTEOGLOSSID. 
103. OsTEOGLOSSUM BICIRRHOSUM Vand. 
Coll. 1873. 
104. ARAPAHMA GIGAS Cuv. 
Probably Nauta, 1873. 
HAPLOMI. 
CYPRINODONTID&. 
105. RrvuLus microrus Stein., Gthr. 
Coll. 1873. 
SYNENTOGNATHI. 
BELONIDZ. 
The genus Belone must be placed in a family group distinct from that 
which includes the genus Hxocetus and its allies. I have already pointed 
out the fact that it possesses a distinct coronoid bone; in addition to this, 
the vertebre display zygapophyses, a character unusual among fishes. On 
these two characters I propose the family Belonide. Professor Gill has 
already created this name, but he did not define the group to which he ap- 
plied it. 
106. BELONE T&N1atTa Ginther. 
Coll. 1873-77. 
PLECTOGNATHI. 
TETRODONTIDA. 
107. TETRODON PSITTACUS Bl. Schn. 
Coll. 1873. 
PERCOMORPHI. 
CHROMIDID&. 
108. Heros auTocHTHon Gthr. 
This species is stated by Dr. Steindachner to be confined to the coast 
