AMERICAN MYRIAPODA. G7 



from a series of lateral pores* a fluid wliich has in its odor a close re- 

 semblance to creasote The Puli/desmns virglniensis is defended by a 

 fluiil which has almost exactly the smell of hydrocyanic acid, and is 

 fatal to small animals. Pctaserpes rosalbus secretes a considerable 

 quantity of a milky substance, which has the perfume of gum cam- 

 phor. 



Pseudotremia cavernarum, Cope, is found :n some of the limestone 

 caves of the valley of Tennessee. I found it especially abundant in 

 the Lost Creek Cave on the Ilolston River, in Granger County, near 

 and on piles of bat excrement under stones. In company with it were 

 numerous small, leaping, lepismoid insects, a Pselaphid beetle, a Cara- 

 bid somewhat like Patrohus, and a spider. Large numbers of a very 

 small Ixodes-like animal covered parts of the surface and cavities of 

 the body of a dead bat in a locality distant from the mouth of the 

 cave. 



The writer examined the Lost Creek Cave for a distance, stated to 

 have been measured, nearly two miles from the mouth, and the state- 

 ment is probably correct, judging by the time occupied in passing 

 through, to the point reached. A creek of considerable size issues 

 from the cave; near the mouth it is dammed, and a race leads the 

 water for a short distance to a corn mill on the banks of the Holston 

 river. The water is crossed by the path perhaps five times before it 

 fills up the passage so as to prevent further progress. The passage 

 is wide, dry, and with so few irregularities that a [lublic road might 

 be readily made in it to that point. I could not find any fishes; just 

 outside the mouth a small Uranidea is not uncommon. The dam with- 

 in the cave abounds in dead los, L^niones. etc., said to be carried there 

 by floods of the Ilolston, but quite as probably the refuse of the meals 

 of Lidians. Bones of Indians, turkeys, and game animals are to be 

 found at the mouth of the cave, which is in a bluff some fifty feet 

 above the level of the Kiver. xVt one side of the entrance a hard 

 limestone deposit contains charcoal, Uniones and ^Melaniaj. The lime- 

 stone cliff produced abundance oi Asplcnium montanum, Pellsea atro- 

 jmrpurea, and a delicate bipinnate Pteris. 



* I must correct my character "no lateral pores" {or Spirostrephon, (Vroa. 

 Aiiicr. Phil. Soc. 1860, p. 179,; to "one series of pores.'' 



