od 
THE MAMMOTH CAVE: 97 
imbedded in the adipose tissue of the orbit, and 
measuring a little less than one-seventy-eighth 
of an inch.* 
“Through the kindness of Mr. Charles Dean, 
of Cambridge, and of Professor Agassiz, I have 
had placed at my disposal some specimens of 
Amblyopsis, well preserved in alcohol, and have 
been able to make, in some respects, a more 
complete description than has yet been given. 
I have also had an opportunity of inspecting, 
superficially, fourteen specimens, varying from 
one inch and a half to four inches and a half 
in length, but in three or four only could the 
eyes be detected through the skin. In the three 
specimens recently dissected, the eyes were ex- 
posed only after the removal of the skin and 
the careful separation from them of the loose 
areolar tissue’ which fills the orbit. In a fish 
four inches in length, the eyes measured one- 
sixteenth of an inch in their long diameter, 
were of an oval form, and black. A filament 
of nerve [the professor here refers to a diagram 
of the eye, which accompanies his paper] was 
distinctly traced from the globe to the cranial 
walls; but the condition of the contents of the 
* New York Medical Times, vol. ii. page 354. 
9 
