1913.] MATURAL SCIENCES OF PHILADELPHIA. 5 



The Sturridge place, about three miles to the southeast of 

 Mandeville, is in the old settled part of the region. Here the original 

 forest has long been cleared, and the country is almost bare of shade 

 trees. A few scattered orange or pimento trees along the roadsides 

 are the only protection from the tropical sun, and the bare fields, 

 while grassy, have an arid look as compared to the dense woods 

 of the original forest. The only cover for the mollusks is in the 

 stone walls, which, as usual, are built along the roads as fences. 

 An old private burying-ground, doubtless belonging to the Sturridge 

 place, had a few trees growing in it which made a little shade and this 

 old cemetery wall was the most favorable place for mollusks that 

 was found at this point. Here and at a few places nearby along 

 the road specimens of L, granulosa were obtained. They were 

 not very plentiful, but were found in fair numbers, and in as great 

 numbers as any other species of mollusk collected at this point. 

 They were quite uniformly small specimens. They inhabited the 

 wall, utilizing its cover, and were collected from the wall and from 

 the ground at its base. 



The other station where the small form of L. granulosa was taken 

 was on the Kendal Road, one mile north of Mandeville ; along a 

 part of the road through pasture lands where the trees had been 

 cleared back from the road on the more level ground, so that there 

 was but little shade along the road. Here again the Lucidellas 

 were living in the low stone walls which lined the road and were 

 especially abundant in places where the top of the wall was covered 

 with moss or fern. Here the dead shells of this small form of L. 

 granulosa were very plentiful, many in verj^ fresh condition, but, 

 during the dry time when I was collecting, no living individuals 

 were seen moving about. They had apparently come up on the 

 tops of the walls to escape from the rain during wet weather 

 and died there. At this place the only cover for the snails was to 

 be found in the wall itself. This, as in the case of the Sturridge 

 place, must have been very dry except after a shower or during the 

 rather uncertain rainy seasons. This small form of L. granulosa 

 is well established at this station, but only the small individuals 

 were seen, as was the case at the Sturridge place. It is practically 

 a small local race at each locality. 



While not so plentiful as L. granulosa in the Mandeville region, 

 L. aureola is found almost everywhere that the conditions are favor- 

 able. This species lives on the ground and is found on grassy banks, 

 even where there is no rock. It does not require rock piles or walls 



