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



Var. suBNEMORALis, nov. 



Ad H. nemoralem magis affinis ; spira depressa, ultimo anfractu 

 compresso, subtus applamto, gradatim descendente ; apertura 

 oblonga, producta, minus nlta, margine externa gradatim rotun- 

 dato, peristomate perlate rejlexo. 

 Diam. 28g, alt. 20| ; apert. (cum perist. ac callositate colura.) alt. 

 15, lat. 17^ millim. 

 Type var., Indian Museum, Calcutta. 



A rather uncommon, more depressed variety, from deposit B only ; 

 generally ornamented with a single very vivid broad band traceable 

 along the suture of the last two or three whorls. 



I need scarcely say I have named this species after my friend Mr. 

 T. B. Coombe Williams, whose name occurs so frequently in these 

 pages. 



Var. SPANIAS, nov. 



Sat tenuis, globosa, depressa, vix nitida aut poUta ; irregulariter 

 striata, distincte malleata ; indistincte zonata, zonulis subobso- 

 letis ; spira depressa, ultimo anfractu ventricoso-rotundato, lente 

 gradatimque descendente, subtus convexo ; apertura ampla, sub- 

 ovalis, peristomate parum rejlexo, locum umbilicalem callo tenui 

 tegente. 

 Diam. 27^, alt. 19; apert. lat. 16|, alt. 1.5 millim. 

 This well-marked form, with more convex base and less solid tex- 

 ture &c., regarded by M. Bourguignat as a distinct species, was 

 rather uncommon ; I found it only in deposits A, B, C. 



Type var., Indian Museum, Calcutta ; also in the collection of 

 M. Bourguignat. 



Helix (Tachea) nemoralis, Lin. 



Not found at all in the submaritime zone, but common enough as 

 soon as one reaches an altitude of 1500 to 2000 feet, up to the very 

 summits of the mountains (4000 feet), where it is of very thin tex- 

 ture ; varieties of 4 to 5 or a single band on the last whorl appear 

 commonest. I found four or five specimens, in poor preservation 

 unfortunately, in the " Couche marneuse " of Cape Mortela, from 

 apparently the zone of H. paretiana ; they are probably a variety of 

 H. nemoralis, though apparently differing somewhat. 



Diam. 2(i4, alt. 21 ; apert. lat. 15, alt. 14 millim. From 

 " Grand Mont," at 4000 feet. 



Diam. 27, alt. 20; apert. lat. 16, alt. 14 ^ millim. From " Ber- 

 ceau," at 3200 feet. 



Diam. 22, alt. 16; apert. lat. ISj, alt. 1I| millim. From near 

 Monaco. 



Diam. 24^, alt. 18|. Subfossil, from Cape Mortela. 



Measurements below from Pfeiffer, Mon. i. p. 276 : — 



Diam. maj. 25, min. 21, alt. 15 milUm. 



Helix (Pomatia) aspersa, Miiller. 



The variation in size, according to the altitude at which this 



