194 3 Ayres on the identity of 
ally with bands; the upper margin of the fin is red. The 
second dorsal, pectorals, and caudal are colored like the first 
dorsal, except that they are destitute of the red margin. The 
ventrals are nearly transparent. The anal is like the second 
dorsal, but not quite so dark. 
The first dorsal arises seven-tenths of an inch from the tip 
of the upper jaw; it is nine-twentieths of an inch in length, 
four-twentieths in height, rounded, highest at about the fourth 
or fifth ray. The rays are feebly spinous. 
The second dorsal arises at the termination of the first. It 
is sixteen-twentieths of an inch in length, six-twentieths in 
height, somewhat rounded, the rays articulated but not 
. branched. 
"The pectorals originate at the termination of the branchial 
membrane; they are oblique in their insertion, so that the 
posterior point of their origin is about even with the tip of the 
operculum, and in advance of the first dorsal. "They are five- 
twentieths of an inch in length, twelve-twentieths in height, 
rounded, highest at the fifth ray counting from the top. The 
tips of the rays extend beyond the membrane, so that the fin 
appears digitate. The rays are articulated, and all simple. 
(I have not found any in which the rays were not simple; 
though it may not be a constant character.) 
The ventrals are situated on a line with the posterior eX 
tremity of the origin of the pectorals. "They are one-tenth of 
an inch in length, nine-twentieths, in height. 
The anal arises nineteen-twentieths of an inch from the tip 
of the upper jaw. It is thirteen-twentieths of an inch in 
length, seven-twentieths in height, somewhat rounded. — 
The caudal fin is five-twentieths in length, ten-twentieths 
in height, not quite even at the extremity, but a little em 
Branchial rays. 6. Fin rays; D. 8— 16; A. 10; 
Deeg P. 14; €. 10. 
I will give now a description of the abdominal organs as 1 
have found them to exist in the species under consideration. 
ne: ] the internal structure as a matter of the greatest 
