C 480 ] 
f i g. n. 
A view of the upper furface of the female. 
a. a. An expofure of the upper part of the 
right ele<fcric organ. 
b. The lkin which covered the organ. 
c. The eyes, prominent and looking hori- 
zontally outwards, but capable of being 
occafionally withdrawn into their 
fockets. 
d. Two circular apertures communicating 
with the mouth, and furnifhed each 
with a membrane, which in air, as well 
as in water, plays regularly backwards 
and forwards acrofs the aperture in the 
office of infpiration, 
e. The place of the right branchia, 
j \ The two fins of the back. 
g. g. The place of the anterior tranfverfe car- 
tilages. 
F I G. III. 
A view of the under furface of the male, whofe 
fize, as here reprefented, is, in general, fmaller 
than that of the female. 
a* Two appendices, diflinguifhing the male 
XL. A 
