506 H. A. Pilsbry — Air-breathing Mollusks of the JBermudas. 



Truncatella clathrus Lowe. 



Plate LXII, Figurb 13. 



This coarse-ribbed and comparatively rare species was collected 

 by both Verrill and Heilprin. It has hitherto been reported only 

 from Porto Rico and St. Thomas. 



Family HELICINID-ffi. 

 Helicina convexa Pfr. 



Plate LXII, Figures 15, 15a. 



Abundant and taken by nearly all collectors. Evidently the Heli- 

 cina subdepressa Poey of Jones, and Si fasciata of some early lists 

 refer to this species. There seems scant justification for Angas' 

 assertion that £r. convexa is identical with H. fasciata; I consider 

 it a well characterized species. 



Bland reports H. convexa from Barbuda ; but I cannot help think- 

 ing that either his identification or locality was wrong. It is prob- 

 ably peculiar to Bermuda. 



Abundant under stones and in walls. — (V.) 



BIBLIOGRAPHY. 



All of the lists based on original material are noticed below. 

 The older ones contain many erroneous identifications. 



1852, 1859. — The Naturalist in Bermuda, by John Matthew Jones (London). Mol- 

 lusca on pp. 106, 107. 



This list is said to be compiled from one by Mr. Temple Prince 

 (sio) published in the Bermuda Almanac for 1852. I have not seen 

 the original list by Prime. The following air-breathing mollusks 

 are enumerated. 



Helix palludosa (Polygyra microdonta). Bulimus bermudensis n. sp. 



" microdonta ( " " ). " sandysii " 



" ptychoides (Poecilozonites circum- Pupa bermudensis " (Bifidaria sp.). 



firmatus). Helicina variabilis (H. convexa). 



" selenina (Thysanophora vortex). Succinea bermudensis n. sp. (S. barba- 



" bermudensis (P. bermudensis). densis). 



" sancta-georgiensis n. sp. Truncatella aurea n. sp. 



" somersetti " Auricula flava (Melampus sp.). 



Bulimus ventrosus (Cochlicella ventrosa). 



