THE NAUTILUS. 127 



After leaving this part of the bank I traversed two miles of red 

 clay soil, covered with pine and shrub, which, though most carefully 

 searched, produced nothing whatever. Below this, several streams 

 were crossed, containing nothing but the usual sand and water. 



The banks now become very steep and in many places the bare 

 rocks are exposed, badly cracked and weather-worn. Here in the 

 crevices of the limestone, so far back as to require the aid of a stick 

 to reach them, I found some beautiful specimens of Polygyra obstricta 

 Say, a few alive and many dead, at the base of the cliff. 



Numerous specimens of Polygyra and Pyramidula were found 

 among the loose and broken fragments of stone, which were here 

 piled in great profusion, between the cliff and the river, but which 

 were all above high -water mark. 



Beyond this place, where the rocks are less numerous and covered 

 by a rich, black soil, I took a few fine specimens of Polygyra albola- 

 bris major Binn. alive and also found many dead and broken shells. 



From this point I left for the hotel, by what I took to be a short 

 cut through the woods but which proved to be very far from an air 

 line. I reached home, however, after about a two hours' tramp, hav- 

 ing spent one of the most enjoyable days I can remember, and well 

 satisfied with the results of my trip. It must be remembered that 

 this tramp was made at a very bad time of year and when all shells 

 were in their winter quarters. 



The following is a complete list of all the material taken : 



SHELLS TAKEN AT CALHOUN FALLS, SOUTH CAROLINA. 



Polygyra tridentata Say. A large, dark-colored shell, found quite 

 plentifully among the loose rocks and broken fragments. 



Polygyra tridentata var. A much smaller shell than the preceed- 

 ing, showing a pinkish shade about the lip. Scarce, and in company 

 with the above. 



Polygyra rugeli Shutt. Quite common under logs. 



Polygyra inflecta Say. Under logs and among loose stones. 



Polygyra albolabris major Binn. Under logs and chips in the 

 black soil. 



Polygyra palliata Say. Eight specimens from the heavily-timbered 

 hill side. 



Polygyra obstricta Say. From the cracks in the limestone cliffs. 



Polygyra appressa Say. Among the loose stones with tridentata. 



