﻿43^ SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. X] 



areas of the spire and base. The basal lamina is quite feeble and low, 



and the sculpture variable. 



Cepolis androsi n. sp. PI. lix, figs. 2, 7, 8. 



Shell small, sharply sculptured with elegantly spaced threads in 

 harmony with the incremental lines, with four moderately convex 

 whorls, a convex base with the lower or pillar lip reflected over 

 and almost completely closing a very narrow umbilicus ; the rest of 

 the peristome hardly reflected ; basal lamina when fully adult strong 

 and high, parallel with the basal lip ; color sometimes uniformly pur- 

 ple brown, or with a narrow peripheral white band under a darker 

 brown line, or with a dark peripheral line with a white one above 

 and below it, or with the brown of the base broken up into four or 

 five spiral bands separated by pale interspaces. Major diameter 

 13.0, minor diameter 11.0, height 7.5 mm. 



Mangrove and Galden Cays in the south bight of Andros Island. 



Though a smaller shell this has a more solid basal lamina than 

 gregoriana or abacocnsis, a much smaller and nearly closed um- 

 bilicus and less reflected peristome, but it clearly belongs to the same 

 group of species. 

 ThysauopJiora vortex Pfeiffer. 



Mangrove Cay, Andros ; Nassau near Fort Charlotte and in the 

 entrance to the cave at Gladstone's place ; and near Johnson's place ; 

 and at Mathews Point on the south side of Abaco. 



This species has the habit of plastering the outside of its shell with 

 dirt (perhaps its own faeces, as in some species of Succinea) which 

 is placed in regularly spaced nodules as well as over the general sur- 

 face, giving the shell a stellate aspect when viewed from above. Be- 

 neath this coating the shell is white or translucent, and when cleaned 

 would hardly be recognized as identical with those retaining their 

 coat of dirt which is doubtless protective. 

 Thysanophora saxicola Pfeiffer. 



Xassau, not uncommon. 



This has not previously been reported from the Bahamas though 

 known from Cuba, Jamaica, etc. It is the Helix mauriniana of 

 Orbigny. 

 Thysanophora dioscoricola C. B. Adams. 



Nassau, near Fort Charlotte and on the Grantstown road; rare. 



This is another addition to the Bahaman fauna, though previously 

 known from Jamaica, Cuba, Florida, etc. 

 Polygyra microdonta Deshayes. 



Common at Xassau and in the Abaco group. 



This race of P. cereolus Miihlfeldt, appears to be spread com- 



