H. A, Pilshry — Air-breathing HoUusks of the Bermudas. 499 



Family STREPTAXIDiE. 

 Ennea bicolor (Huttou). 



A single specimen of this little traveller was taken by Prof. Heil- 

 prin's class, and is now first recorded. Originally East Indian, the 

 species has now been scattered widely in the Eastern Hemisphere. 

 It has been recorded from Trinidad, and Mr. S. N. Rhoads collected 

 specimens near Havana in 1899. 



Family ZONITIDiE. 



This family contains the only genus of land snails peculiar to Ber- 

 muda, Poecilozonites. The relationships of this group are clearly 

 with the genus Gastrodonta, which is confined to the eastern United 

 States. The generic synonymy, which is somewhat extensive, has 

 been given in full in Proc. Acad. Nat. Sci., Phila., 1889, p. 86. The 

 species are as follows : — 



a. No lamina within the mouth. 



b. Umbilicus narrow ; columella making an angle with the basal 



lip ; shell strong and solid. P. bermudensis, P. nelsoni. 

 b\ Umbilicus wide ; peristome evenly arcuate below; shell thin, 

 radially flammulate. P. rehiianus. 



a\ A lamina revolving within the aperture, on the outer wall. 



P. circumjirmatus. 



Poecilozonites bermudensis (Pfr.). 



Pilsbry, Proc. Acad. Nat. Sci. Phila., 1888, p. 289; 1889, p. 85. 



This is one of the most abundant and the largest living species. 

 While usually banded with brown, it is sometimes plain yellowish ; 

 and the young are often prettily flammulate. 



It occurred under stones and old logs, and in walls ; generally dis- 

 tributed.— (V.) 



The Helix ochroleuca of Pfeiffer's monograph (vol. i, p. 80) 

 described from Bermuda, looks like a narrowly umbilicate P. bermu- 

 densis with the periphery rounded, not carinated. If really Bermu- 

 dian, it probably is a distinct species of Pcecilozonites, which will 

 require a new name when rediscovered, as it is not the ochroleuca of 

 Ferussac. 



Helix ochroleuca Ferussac (Histoire, pi. 30, f. 1) is identical with 

 the later Pachystyla rufozonata H. Ad. {cf. Nevill, Journ. Asiat. 

 Soc. Bengal, 1875, p. 104), a Mauritian species. 



