Structure and Oeconotny of Whales. 441 
The cryflalline humor refembles that of the quadruped ; 
but whether it is very convex or flattened, I cannot determine, 
thofe I have examined having been kept too long to preferve 
their exadl fhape and fize. The vitreous humor adhered to the 
retina at the entrance of the optic nerve. 
The optic nerve is very long in fome Ipecies, owing to the vafl 
width of the head. 
I (hall not at prefent conflder the eye in animals of this tribe, 
as it refpedls the power of viflon, that being performed on a ge- 
neral principle common to every animal inhabiting the water ; 
more efpecially as I am only mafter of the conflrudlion and for- 
mation of the eye, and not of the fize, fhape, and den fi ties of the 
humors; yet, from realoning, we muft fuppofe them to cor- 
refpond with the fhape of the eye, and the medium through 
which the light is to pals. 
Of the Parts of Generation . 
The parts of generation in both fexes of this order of ani- 
mals come nearer in form to thofe of the ruminating than of any 
others ; and this fimilarity is, perhaps, more remarkable in the 
female than in the male; for their fituation in the male muff 
vary on account of external form, as was before cbferved. 
The teflicles retain the fituation in which they were formed, 
as in thofe quadrupeds in which they never come down into the 
fcrotum. They are fituated near the lower part of the abdo- 
men, one on each fide, upon the two great depreflors of the 
tail. At this part of the abdomen, the teflicles come in contact 
with the abdominal mufcles anteriorly. 
The vafa deferentia pals directly from the epididymis behind 
the bladder, or between it and the reftum, into the urethra; 
Q^q q 2 and 
