On the Organs of Vision in the Common Mole. 101 
mass of cellular fibrous tissue which assumes on dissection a fusiform 
shape, with an attenuated portion passing towards the base of the 
Skull." The filament becomes so exceedingly delicate in the deeper 
part of the orbit that the difficulty of ascertaining its precise con- 
dition is probably the reason of the difference of opinion on the 
t. 
In Mr. Solly's specimen there was found to be no attachment 
whatever of the filament to the base of the skull; but in a former 
outer and inner side, it is not in my po J 
whence they come, as their 
them in the deeper part of t 
skull. ; 
The eye of the full-grown Mole presents a surface uniformly 
black and glistening, in which there is no indication of a cornea and 
sclerotic distinct from one another, nor any evidence of an iris or 
pupillary aperture. Within the globe, when ruptured with the 
points of needles, a layer of black pigmentary particles was found 
to line the internal surface of the dense structure which corresponds 
to the sclerotic. ; 
In addition there was a confused mixture of grey and white 
granular substance, in which there was no distinct evidence of re- 
mains of the usual contents of the globe of the eye, though, as will 
seen, those structures exist in fcetal life. ; 
The specimens were sent to me preserved in alcohol, consequently 
the brain was firm, and easy to be removed entire from the cranium. 
