114 
ICHTHYOLOGY 
The colour is white and silvery, with the upper parts darker 
and rather purple ; there is no longitudinal streak on the 
sides ; the fins are yellow, edged with black, with the excep- 
tion of the anal and ventrals, which are entirely of a bright 
sulphur colour ; the membranes of the second dorsal have 
oblique obscure streaks. 
Length of my largest specimens from eleven to twelve 
inches. 
1 It is only with some doubt that I consider this fish to belong 
to S. Giliata, as it has no appearance of a longitudinal streak. 
If on comparison it was found different, I would propose for 
it the name of Insularis. 
EQUULA CABALLA. 
Centrogaster Equula, Lin. Gm., 1337. 
Csesio Equulus, Lacep. iii., 88, 90. 
Equula Caballa, Cuv. and Vol. x., p. 73. 
Two specimens, eight inches long ; silvery, with the back 
of a light blue; fins yellow; the axle of the pectorals 
obscure. 
ECHENEIS NAUCRATES. 
Echeneis Naucrates, Lin. Sys., Nat. i., p. 446. 
The disk has twenty-five laminae, and is contained four 
times and a-half in the total length ; dorsal with thirty-nine 
rays, and anal with thirty-eight ; caudal rather strongly 
bilobed ; the lower lobe much larger than the upper one ; 
pectorals nearly as long as the head 
Length twenty-three inches and a-half. 
TEUTHYS CONCATENATES. 
Amphacanthus Concatenatus, Cuv. and Vol., vol. x., 
p. 127. 
Height of body twice and one-third to the central edge of 
the caudal, or a little over twice in the length without this 
fin ; head four times in the first of these measurements ; eye 
three times and a quarter in the length of the head, and once 
and two-thirds in the distance from the end of the caudal to 
