25 
Lo 
separated by short intervals. Everywhere beneath the integu- 
ments appear numerous adipose cells, but no scales are visi- 
ble. In the adult the length of the tail is contained from 3 /, 
to 3U, times in the total length, but, in younger individuals, 
from 3°/, to 13 inches in length, the tail varies from 25/, to 
23/, times in the total. All the fin-rays are double, and loo- 
sely tied together. The pectoral fins are very small, broad 
lanceolate. In the adult their length scarcely exceeds the dis- 
tance from the eye to the point of the upper jaw. They are 
developed at a later period than the rest of the fins. In indi- 
viduals 3°/, inches in length, the pectorals are rudimentary and 
scarcely perceptible bij the naked eye. The number of rays is 
generally 10, rarely Îf on either side. The dorsal, caudal 
and anal fins are so closely united that their rays can only be 
ascertained by dissection, but the exact termination of these 
fins cannot be fixed. In an adult examined, the number of 
visible rays of the three fins amounted to 255, of which 12 at 
least, from their position appeared to be caudal. The anal in 
extent exceeds the others. In the adult it commenees at a dis- 
tance behind the anus, equal to half the length of the head. 
In very young individuals the fin commences much nearer the 
anus, the distance scarcely exceeding !/; of the length of the 
head. In the adult male dissected, 25%, inches in length, the 
125 visible anal rays were preceded bij 8 very short ones, com- 
pletely hidden by the integuments. The double rays are pla- 
ced towards each other, so as to resemble the letter V. The 
anterior half of the anal fin is arched, the longest rays being 
little shorter than the corresponding vertical diameter of the 
tail. The fin then continues very low, linear, with the rays 
scarcely exceeding the diameter of the eye, to within a short 
distance of the point of the tail, where the sides begin to be 
compressed. Frem thence the fin increases in height, and forms 
with the caudal and dorsal, a broad lanceolate fin encircling 
{he apex of the tail. The caudal fin is in different individuals 
more or less pointed, rounded or even truncated. In form the 
dorsal resembles the anal fin, but its extent is less. It com- 
