126 MR. G. NEVILL ON THE [Feb. 17, 



&c., with a marked tendency (here at least) to produce abnormal and 

 remarkable forms : it also ranges from the sea to a considerable altitude, 

 though I do not think Mr. Williams found it above 2800 feet. I found 

 what I consider the tj'pical form, small and moderately convex, here 

 and there near the sea, rather scarce, not in company with the fol- 

 lowing variety ; we also procured somewhat similar specimens from 

 St. Agnes (2500 feet). It did not occur at Alassio. 



Long. \0h, diam. 3| millim. A constant form, Menton (11 

 whorls). 



Long. 13|, diam. 3| millim. From St. Agnes (12 whorls). 



Var. POLITA, Risso. 



The finest and most remarkably turriculately produced specimens 

 of this variety which M. Bourguignat had ever seen were some 1 

 found on the Hill of Grimaldi, where, though localized, it abounded ; 

 I found a similar form in the upper stratum of Cape Mortela. 



Long. 19, diam. 4^ millim. An extreme turriculate form, of 

 15 whorls, from Grimaldi. 



Long. 15, diam. 4 millim. An ordinary form, village of Roque- 

 brune (1500 feet). 



Pupa (Torquilla) obliqua, n. sp. (Plate XIIL fig. 4.) 



T. ad P. multidentatam affiiiis, sed forma minor, compressior, tnoffis 

 cylindrica et turriformis ; anfr. 1 1 , fere cequales, svtura magis 

 impressa separati ; apertura percontracta, quadranffularis, mar- 

 ginibus suhrectis, parallelis ac callositate pervalidajunciis ; mar- 

 gins columellari inferne distincte angulato {in P. multidentata 

 subrotundato) ; plica parietalis minus obliqua et prominens, jjliccc 

 columcllares magis -profunda, plica palatalis j)rincipalis conspicua 

 et notabilis, recte ascendens, haud arcuatim incurvata. 

 A rather rare species, from deposits B and F only ; M. Bour- 

 guignat informs me he possesses numerous recent specimens from the 

 " Plateau glace de Meaille, Dcpt. Basses- Alpes," I had hoped he 

 would have honoured me with a Latin diagnosis, as in two other 

 instances, in which case I should gladly have attached his name to 

 this species ; I do not think it right to do so without such diagnosis, 

 for fear of introducing doubt as to what is really the type of the 

 species. I should have ranked this subfossil form as a remarkable 

 dwarf variety of P. multidentata, but for the constant and charac- 

 teristic difference in the prominent palatal fold, which is always more 

 or less semicircularly and markedly curved or rounded in all the 

 forms I know of P. multidentata ; in my new species this fold ascends 

 the aperture without any deflection or curve whatever ; the parietal 

 fold is also distinctly straighter and less prominently produced ; the 

 columellar margin not being in the least convex, as well as distinctly 

 augulate at base, seems also a constant character. The present form 

 is nearer the wonderfully produced and turriculate var. polita of 

 Risso than typical P. multidentata. 



Long. 10, diam. 3 millim. Type from deposit F. 

 Long. 9|, diam. 3^ millim. S[)ecimeu from deposit B. 



