1880.] LAND-SHELLS OF MENTON. Ill 



cimens, I have not been able to obtain a single one in even fair con- 

 dition ; they crumble at a touch. The best-characterized were four 

 specimens of a form which I found only at the entry to the cave, de- 

 posit F; one of these I have taken as my type. Var. colorata, always 

 in bad condition, was tolerably plentiful in de|)osits A and D. Var. 

 crassior, from deposit E only ; I am by no means sure that this form 

 is specifically identical with typical H. cedesima. The species did 

 not occur at all iu deposit B. 



Helix (Tachea?) bennetiana, n. sp. 



■ Testa ad H. mentonicam affinis, sed haud difficile distinguenda ; im- 

 perforata, globosa, paiilulum conoidea. solida ; rugose irregulari- 

 terque striata, valide maJleata ; albida, zonuUs peri?idistinctis 

 circumcincta ; spira parum moderate elevata, apice subacuta, 

 laevigata; an/ract. 5^, convexiuscuU, sutura distincta separati, 

 ultimo majore, ad peripheriam paululum compresso, subito de- 

 scendente, subttts convexo ; apertura contracta, parva, sub- 

 rotundata, lunato-ovata, marginibus callo briinneo junctis ; pert- 

 stem, castaneum incrassatum, ea:pansum; columellaris callosa, late 

 adpressa, subrugosa, paululum contortula. 

 Diam. 23|, alt. 17; apert. lat. \Ah ; alt. 11| millim. 

 A still smaller form, closely alhed to the preceding, easily recog- 

 nized by its small aperture and convex base &c. It was only found 

 in deposits B, C, and E, and was comparatively rare ; the coloration, 

 ill every specimen found, was much broken up, scarcely showing 

 traces of bands. I have named this species after Dr. J. H. Bennet, 

 who may be called the " Discoverer of Menton," whose estate of 

 Grimaldi, with its beautiful and well-known gardens, alwaj's thrown 

 open to visitors, surmounts these boue-caves, and to whose kind 

 assistance I am deeply indebted for much valued aid and sympathy 

 in collecting my material for this paper. 



Type, Indian Museum, Calcutta ; also in collection MM. Bour- 

 guignat and Williams. 



Helix (Tachea) wtilliamsiana, n. sp. 



Testa ad H. nemoralem, Linn., affinis ; imperforata, conico-glohu- 

 losa, percrassa, polita, nitida ; confertim ac regulariter oblique 

 striata, ultimo anfractu distincte tnalleato ; albido-lactea, fere 

 omnino late eleganterque unizonata, zonula castanea ad apicem 

 videnda (speciminibus raris subtus duabus aliis zonuHs latis 

 circumcinctis) ; spira elevata, apice subacuta, Icevigata ; anfract. 

 5g, convexiuscuU, celeriter crescentes, sutura distincta separati, 

 ultimo ventricoso-subrotundato, subabrupte descendente, subtus 

 vix convexo, subapplanato ; apertura subovalis, parum obliqua 

 ac lunata, marginibus callo tenui castaneo junctis; peristom. 

 extus ac intus vivide castaneo coloratum, supra fragile, vix in- 

 crassatum, infra expanse reflexum ; columellaris sicut in H. ne- 

 morali, sed callo validiore locum umbilicalem tegente. 



Diam. 30|, alt. 22; apert. alt. 16, lat. 18| millim. 



