92 THE MAMMOTH CAVE. 
intestinalis—a new Chilomonas, which he calls 
‘Ch. emarginata, and a species allied to ‘Kolpoda 
cucullus.’ 
“As already mentioned, Dae has referred 
the blind fish, with doubt, to the family of 
Siluride Dr. Tellkampf, however, establishes: 
for it a distinct family. Dr. Storer, in his 
Synopsis of the Fishes of North America, pub- 
lished in 1846, in the Memoirs of the American 
Academy of Arts and Sciences, is also of opinion 
that it should constitute a distinct family, to 
which he gives the new name of ‘ Hypseide,’ 
page 455. From the circumstance of its being 
viviparous, from the character of its scales, and 
from the form and structure of its head, I am 
inclined to consider this fish as an aberrant type 
of my family of Cyprinodonts. 
“You ask me to give my opinion respecting 
the primitive state of the eyeless animals of the 
Mammoth Cave. This is one of the most im- 
portant questions to settle in Natural History, 
and I have, several years ago, proposed a plan 
for its investigation, which, if well conducted, — 
would lead to as important results as any series 
of investigations which can be conceived; for it 
might settle, once and forever, the question, in 
what condition and where the animals now 
