PACKARD ON A NEW CAVE FAUNA IN UTAH. 163 



and a> certain species inhabiting Ceylon, Polydesmus cog^iatus, which it 

 resembles more nearly than any American species known to me, both 

 in the cylindrical body and form ot the antennae. 



Julus, sp. — A fraction of a galley- worm comprising a few segments only, 

 agrees in form and color with an undescribed species from Colorado, 

 and is probably not a cave species. 



MOLLUSCA. 



Of the following species, described by Mr. W. H. Dall, several 

 examples occurred. Specimens were sent to Mr. W. G. Binney, who 

 regards it as " apparently an albino variety of Zonites in(lentatcC\ Speci- 

 mens were submitted to Prof. E. S. Morse, who judged it to be quite 

 distinct from Z. indentata. Other specimens were sent to Mr. Dall, who 

 describes it as a new species, and has kindly prepared the following 

 notice : — 



^^Hi/ali7ia suhnipicola, n. s. (Fig. 7). — This little shell is 

 best described by a comi^arison of its various character- 

 istics with those of H. indentata Say, as given by Dr. 

 Binney in his Land and Freshwater Shells of the 

 United States (part I, p. 35). 



"il. suhrupicola, while exhibiting radiating lines of 

 growth, some of which are more conspicuous than 

 others, does not show any such well-marked grooves 

 or indentations as are figured by Morse (Laud Shells of 

 Maine) in indentata, and which form its most striking pj^ T,_^^na suhm- 

 specific character. The former has five and a half ^*'"'''*' ^'''^^' ^- ^p- 

 whorls, with a greatest diameter in the largest specimen of 0.14 inch, 

 while indentata has but little more than four, with a diameter of 0.20 

 inch. The former is perfectly pellucid, while the latter has a peculiar 

 whitish spermaceti-like luster. S. subrupicola has thelast whorl smaller 

 proportionally than indentata, and in fact the increment of the whorls 

 in the former is much more regular and even. The umbilicus in both 

 is precisely similar. 



'• The animal of subrupicola varies from whitish to slaty ; the granules 

 of the upper surface of the foot are remarkably coarse and well marked. 

 The tentacles are, as contracted in alcohol, hardly perceptible j the eye- 

 peduncles, are from the same cause, not extended, but appear to be as 

 usual in the genus, and to possess normal ocular bulbs. The ofiSce 

 filled by these, however, being quite as much of a tactile nature as for 

 purposes of sight, the usual rule in regard to the blindness of most cave 

 animals does not apply in the case of the Helicidcc. With the excep- 

 tion of H. indentata, this species does not seem very near to any of the 

 described American species, and it is totally dissimilar to Ammonitella 

 yatesii J. G. Cooper, a remarkable form found in caves in Calaveras 

 County, California. 



"^«Z>.— Cave in Utah. Collected by Dr. A. S. Packard, jr., of Dr. Hay- 

 den's Survey. 



