82 MEMOIRS OF THE RATIONAL ACADEMY OF SCIENCES. 
IV.—SYSTEMATIC LIST OF THE CAVE ANIMALS OF THE UNITED STATES. 
Class INFUSORIA. 
Vibrio sp. ^ ' f' ' 
Chilomonas emarginata Ehr. in Tellkf., New York Joum. Med., 86, July, 1845. Mammoth Care. 
Chilodon cucullus Ehr. ? Mammoth Cave. 
Monas, resembling M. kolpoda. Mammoth Cave. 
Monas sp. Mammoth Cave. 
Colpoda f . Mammoth Cave. 
Nassula ? or Prorodon ? . Mammoth Cave. 
Bodo ? . 
Synedra ulva Ehr. 
Branch VERMES. 
-—Vortex ? cavicolens Pack., Amer. Naturalist, Jan., 1883. Carter caves. 
Dendroccelumpercoecum Pack., Zoology, 142, 1879. Mammoth Cave. 
A Nematoid worm parasitic in rectum of larva of Adelops hirtus Hubbard, Amer. Ent., iii, 1880. 
Lumbricus sp. Mammoth Cave. Hubbard, Amer. Ent., iii, 1880. 
Class CRUSTACEA. 
- Cauloxenns stygius Cope. From blind-fish taken from a well near Wyandotte Cave. 
Canthooamptus cavernarum Pack., Zoology, 297, 1879. Mammoth Cave. 
- Cwddotwa stygia Pack., Amer. Naturalist, 752, v, 1871. Mammoth and Wyandotte caves. 
Cascidotwa nickajaclcensis Pack. Nickajack Cave, Tennessee. 
- Crangonyx vitreus (Cope), Amer. Naturalist. Mammoth Cave. 
Crangonyx packardii Smith. Wells in Orleans and New Albany, Indiana, 
-- Crangonyx antennatm Pack., Amer. Naturalist, xv, 880, 1881. Nickajack Cave, Tennessee. 
rr,~.yJZjr n30nyX mueronatus Forbes, Bull. Ill. Mus. Nat. Hist., i, 6, 1876. Wells in Normal, Illinois. 
' tmnkmTnH,mifugus Hay, Amer. Naturalist, xvi, 144. Well in Illinois. 
-- Cambaruspellucidus (Tellkf.). Mammoth, Wyandotte caves, etc. 
Canibarus hamulatus (Cope). Nickajack Cave. 
Class ARACHNIDA. 
Order Acarina. 
Bhyncholopbus cavernarum Pack. White’s Cave and Long Cave. 
Br V Mia ? or Penthaloeus ? weyerensis Pack. Weyer’s Cave. Mr. Michaels writes that this probably belong 
to the genus Labidostoma (Kramer) or Nicoletia of Canestrini. ” 
Lcelaps (or Holostaspis f) wyandottensis Pack. Wyandotte Cave. 
Lcelaps (=Iphis f) cavernicola Pack. Mammoth Cave. 
Qamasus (or Hypoaspis ? ) troglodytes Pack. Mammoth Cave. 
- Gamasus stygius Pack. Bat Cave, Carter Caves, Kentucky. 
Damwus (—Delia) bnlbipedalus Pack. (Probably from Mammoth Cave. The form represented by Fig. 8 PI. 
X, Mr. A. D. Michaels* thinks is “probably genus Notaspis.”) 
Uropoda lucifngus Pack. New Wyandotte Cave. 
Oribata (data Pack. Dixon’s Cave. 
Sejus f 8anborni Pack. Cave near Dismal Creek, Kentucky. 
* While this paper was going through the press I sent proofs of the figures to Dr. Trouessart and also to Mr A 
D. Michaels, hoping to hear from one or the other before going to press, asking information concerning the genera of 
these mites, of which I have no special knowledge. Both kindly and promptly replied, but it is to be understood 
that they saw only rather indifferent figures, and that their determinations are largely conjectural, as in some cases 
my figures did not show either generic or specific characters. But the information was gladly received, for when 
some one takes up the study of our mites and collects in our caverns, he will undoubtedly be able to find’ the forms 
here referred to and to correctly place them in their proper genera. Meanwhile the information here given is better 
than none at all. At the same time due allowance must be given to the fact that the two naturalists above named 
who have kindly aided me have based their suggestions or determinations on my sketches alone, not having either 
drawings made by an expert or the specimens themselves. 
