THE MAMMOTH CAVE AND ITS INHABITANTS. 747 
kampf’s figure indicates, it is the same species apparently, as I 
have received numerous specimens of this widely distributed form 
from Lexington, Kentucky, collected by Dr. Josiah Curtis. 
It was regarded as a crustacean by Tellkampf, and described 
under the name of Triura cavernicola.* He mistook the labial 
and maxillary palpi for feet and regarded 
the nine pairs of abdominal spines as feet. | 
The allied species, M. variabilis Say, is 
Campodea. 
Fig. 127. 
figured in vol. v. pl. 1, fig. 8, 9 (see also 
p. 94 of this journal). 
An interesting species of Campodea t of 
which the accompanying cut (Fig. 127) is 
a tolerable likeness, though designed to il- 
lustrate another species (C. staphylinus 
Westw.) was discovered by Mr. Cooke. 
Both the European and our common spe- 
cies live under stones in damp places, and 
the occurrence of this form in the water is 
quite remarkable. The other species are 
blind, and I could detect no eyes in the 
Mammoth Cave specimen. 
A small spider was captured by Mr. 
Cooke, but afterwards lost; it was brown 
in color, and possibly distinct from the 
Anthrobia monmouthia Tellkf. (Fig. 128) which is an eyeless form, 
white and very small, being but half a line in length. The family 
* Professor Agassiz in his meet noticea pi the Mampan can animals, ipes eat m 
of t 
upon the articulates as pai rem E that while “ Dr. Tellkampf’s account affords 
rming any conclusion t ex its proximate relations,” that, however, 
marka 
struc ture.” kapis figure of Mackin ie entirely wrong in representing the labial 
maxillary palpi as ene in kieti thus giving the creature a crustacean aspect; 
ni indeed y describes them eet! 
Cookei n. sp. isle allied to C. Americana, but it is much ee the an- 
tennz are Sei instead of sii as in C. Americana, and reach to the basal 
abdominal segment, while in ©. A na they reach only to the second ‘eas ; the 
terminal joints are much longer than i in n that species, the penultimate Joint being one- 
thitd longer ) the penul- 
timate very short. not half as long as the terminal, which i is longer and edee than in 
C. Americana, while the three are much narrower in proportion to the rest o ; ne pony 
erica 
tured in a pool of water, two or three inches deep, in company with EUO 
