312 truitcatellidjE. 



still more terrestrial than the Truncatellce ; the Island of 

 Jamaica furnishes all the species known, though many, 

 doubtless, exist undiscovered in the adjacent islands. 



Species of Geomelania. 



affinis, C. B. Adams. magna, C. B. Adams. 



Beardsleana, C. B. Adams. media, G. B. Adams. 



couica, G B. Adams. minor, G. B. Adams. 



costulosa, C. B. Adams. pauperata, C. B. Adams. 



elegans, C. B. Adams. procera, G B. Adams. 



exilis, G B. Adams. pygniaea, C. B. Adams. 



expansa, C. B. Adams. pyramidata, G. B. Adams 



fortis, C. B. Adams. striosa, G. B. Adams. 



gracilis, C. B. Adams. typica, G. B. Adams. 



Hilliana, G. B. Adams. vicina, G. B. Adams. 

 Jamaicensis, Pfeiff. 



Genus ACICULA, Hartmann. 



Operculum very thin, glassy, few-whorled. 



Shell sub-imperforate, rather cylindrical; peristome some- 

 what thickened, the margins sub-parallel, united by a thin 

 callus. 



Syn. Acme, Hartm. Acmea, Hartm. Pupula, Agass. 

 Auricella, Jurine. 



Ex. A. fusca, Walker, pi. 88, fig. 3. Shell, A. fusca, 

 fig. 3, a. 



The species are principally found in Germany, Switzer- 

 land, France, Britain, and Northern Italy; they affect lo- 

 calities similar to those preferred by the El/obiidce and 

 Truncatellas, such as low, marshy situations, especially in 

 the vicinity of the sea. 



