116 MR. G. NKVILL ON THK [Feb. I 7> 



elevated spire ; without exception, as far as I could see, imperforate, 

 •with large and produced aperture, deflected last whorl, and fairly 

 vivid markings. 



Specimen from Sainte-Agnes — alt. 17^, diam. 2^^ millim. 



From the " Berceau" — alt. 15, diam. 24^ milUm. ; and 

 another — alt. 17^, diam. 24|^ millira. 



Subvar. colorata. 



I did not find this species at all in the " Couche Marneuse " of 

 Cai)e Mortela (zone of //. paretiana), though I have but little 

 doubt it occurs. I found it, however, associated with H. paretiana 

 near Monaco, and at another spot in a cutting of the railway, the 

 single specimen from the latter locality being a most remarkable 

 small form, the chestnut maculations being most unusually broad 

 and close together, so much so as to amount to bands ; there are 

 three of these slightly interrupted bands on each of the last few 

 whorls ; the apertuie also is less produced, the apex more prominent, 

 aud the whorls more compressed. 



Alt. 14, diam. igimiUim. 



Subvar. primitiva. 



Closely allied to the living form still to be found near the summits 

 of the neighbouring Alps ; imperforate, of thin texture ; spire more 

 or less raised, not nearly so depressed as in the next variety, with 

 prominent apex ; whorls moderately convex, the last one abruptly 

 deflected, convex at base ; both aperture and last whorl a trifle 

 smaller in proportion than in the living form ; the columella very 

 similar, only moderately oblique, forming a slight angle at its 

 termination, slightly twisted, imparting to it a subtuberculose 

 appearance. 



This was one of the commonest (and best-preserved of the large 

 species) in deposits A, B, C, E. Curiously enough, the species did 

 not occur at all in deposit D ; probably this locality was not suffi- 

 ciently sunny. 



I have great doubts whether I have done right in separating this 

 form, even only as a subvariety, from its close ally, living on the 

 neighbouring mountain-tops ; probably both had better be classed 

 together as subvar. primitiva, characterized by the thin texture &c. 



Alt. 16, diam. 2'Z millim. ; another — alt. 17, diam. 24^ millim. 



Types of preceding subvars., Indian Museum, Calcutta ; the latter 

 also in coll. MM. Bourguinat, Coombe Williams, and Joly. 



Var. SPELUNCARUM, nov. 



As to the necessity of separating this form there can be no two 

 opinions ; it is an exceedingly well and constantly characterized 

 depressed variety, presenting a most distinct " facies." It was 

 abundant in deposit F, and, I have reason to believe, was the principal 

 shell fouud inside the cave by M. Riviere, mixed with mammal- 

 bones &c., judging from specimens in the museum, and from an 

 examination of the earth dug out from these caves. Markedly and in 



