102 MR. G. NKVILL ON THE [Feb. 17, 



forming a more distinct and more triangular lunule than, I believe, 

 in any other species of the genus ; the back, too, is more regularly, 

 closely, and deeply sulcate. 



Type, Indian Museum, Calcutta ; also in coll. J. R. Bourgui- 

 gnat and Coombe Williams. 



Daudebardia isseliana, n. sp. (Plate XIII. fig. 2.) 



T, umbilicata, applanata, sat frayilis, nitidissima, pallide cornea ; 

 apex paululum lateralis ; anfract. 3, hand conipressi, celerrime 

 crescentes, vix convexiusculi, sutura impressa separati, ultimo 

 valde dilatato ; apertura transverse oblonga, oblique eloiigata 

 (Jiaud " rotundato-ovalis " sicut D. rufa), maryine externa lente 

 subrotundato, marginibus callo tenui junctis, columellari incras- 

 sato, subrecto, ad basim suhangulato. 

 Long. 4i, lat. 2^-^ millim. 



Compared with the three German species, D. isseliana is nearest 

 D. rufa, from which it can be at once distinguished by its greater 

 proportional breadth, caused by the much more rapidly increasing, 

 slightly less convex whorls (apparent in all three, not only in the 

 last one); the apex is less central, the texture a trifle stouter and 

 more polished ; the aperture, instead of being ovally rounded, is 

 regularly transversely oblong, the outer margin being scarcely ar- 

 cuate, instead of markedly so (that is, much more gradually rounded); 

 and the columellar much less oblique, thicker, and altogether more 

 prominent, more subangulate at its base. Daud. nuhigena, Bourg., 

 from Algeria (Moll. nouv. &c., xi. & xii. fasc. pi. iv.), is even nearer ; 

 but is a less elongately produced shell, less appressed, the aperture 

 more rounded and not subangulate at the columella, which is more 

 oblique and less prominent. This species appears to have been very 

 rare : with diffiqulty I found, in deposit B only five specimens, Mr. 

 Williams obtaining about the same number. 



Type, Indian Museum, Calcutta ; also in coll. J. Rene Bourgui- 

 guat and Coombe W^illiams. 



ViTRiNA (Oligolimax), n. sp. 



A single specimen, from deposit B, was all we could find of this 

 interesting form. I think it better under these circumstances not to 

 describe the species ; I will only mention that the narrow perforation 

 is quite distinct. 



Unique specimen in Indian Museum, Calcutta. 



LiMAX AGRESTis, Liunseus. 



Not uncommon in the submaritime zone. 



LiMAX, sp. 



We found many hundred subfossil shells of this genus in deposits, 

 evidently belonging to at least four or five different species ; one 

 common, fine and well-marked form nicatures, long. 10, lat. 4|, 

 crass. 2 millim. 



