Mr. W, H. Benson on a Jietv Pupa and a new Bulimua. 99 



also referred, with a mark of doubt, to P, minutissima, but the 

 size, the ivory peristome, and the angular plait (postice ad dex- 

 tram) seem to identify his shell with P. umbilicata, which is not 

 uncommon about Nice, Linnaeus^s prior name of P. muscorum 

 being now by common consent attributed to P. marginaia, Drap., 

 the species intended by Drapamaud and his followers, whether 

 referable to minutissima or to the species above described, can 

 no longer bear the name assigned to them by those authors. 



Kiister notes as one of the characters which separate P. um- 

 bilicata from P. Sempronii, a species found at Bex and the 

 Simplon, that the latter is deficient in the fold of the columella, 

 which is always present in the other, to which he assigns the 

 character " columella subplicata." Pfeifier overlooks it alto- 

 gether ; it must however be confessed that ordinarily this plait is 

 inconspicuous, and only to be observed when particular attention 

 is directed to it. In one of my Nice specimens this feature is so 

 strongly marked as to attract immediate notice. 



l^Note. — Specimens of Pupa Rivierana were collected by Mr. 

 John Paget near ^lontpellier, quite identical with the Nice shell 

 in habit, teeth, and columellar fold. They were by him referred 

 to P. minutissima, although the parietal and palatal teeth had 

 attracted his notice. The climate and situation of Montpellier 

 are similar to those of Nice. I have found two specimens here, and 

 Mr. Paget has since procured a third. — W. H. B. Jan. 10, 1854.] 



Bulimus Baconi, nobis, n. s. 



Testa perforata, globoso-ovata, tenui, pallida, castaneo-fusco-bifasciata, 

 sericea, coufertim striata, superne striis exilissimis decussata ; spira 

 conica, apice obtuse, papillari, sutura tenuiter crenulata ; anfrac- 

 tibus 5 conyexiusculis, ultimo inflate, dimidium testae vix supe- 

 rante, bifasciato, fascia 1 superiori angusta, altera inferiori lata : 

 apertura ovata, peristomate simplici acute, margine columellari 

 superne reflexiusculo. 



Axis 23, diam. 15, alt. apert. 12, diam. 9 mill. 



Haf). in Australia occidentali. 



Found by Dr. Bacon in Darling's Range, six miles from Hen- 

 ley Park on the Avon River. In its transverse bands and colour- 

 ing it differs from all the West Australian species, and inclines 

 to the Tasmanian B. Dufresnii. 



Nizza ilaritima, December 1853. 



7* 



