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Show 1880.] LAND-SHELLS OF MENTON. Ill cirnens, I have not been able to obtain a single one in even fair ; they crumble at a touch. The best-characterized were four specimens of a form which I found only at the entry to the cave, deposit F; one of these I have taken as m y type. Var. colorata, always in bad condition, was tolerably plentiful in deposits 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 in deposit B. HELIX (TACHEA?) BENNETIANA, n. sp. Testa ad II. mentonicam affinis, sed haud difficile distinguenda ; globosa, paululum conoidea, solida ; rugose irregulari-terque striata, valide malleata; albida, zonulis perindistinctis circumcincta; spira parum moderate elevata, apice subacuta, laevigata; anfract. 5^, convexiusculi, sutura distincta separati, ultimo majore, ad peripheriam paululum compresso, subito de-scendente, subtus convexo; apertura contractu, parva, sub-rotundata, lunato-ovata, marginibus callo brunneo junctis ; perist om. castaneum incrassatum, expansum; columellaris callosa, late adpressa, subrugosa, paululum contortula. Diam. 23f, alt. 17; apert. lat. 14|; alt. Ilf millim. A still smaller form, closely allied to the preceding, easily recognized by its small aperture and convex base &c. It was only found in deposits B, C, and E, and was comparatively rare ; the coloration, in 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, always thrown open to visitors, surmounts these bone-caves, and to whose kind assistance I am deeply indebted for much valued aid and sympathy in collecting m y material for this paper. Type, Indian Museum, Calcutta; also in collection M M . Bourguignat and Williams. HELIX (TACHEA) WILLIAMSIANA, n. sp. Testa ad H. nemoralem, Linn., affinis; imperforata, conico-globu-losa, percrassa, polita, nitida; confertim ac regulariter oblique striata, ultimo anfractu distincte malleato; albido-lactea, fere omnino late eleganterque unizonata, zonula castanea ad apicem videnda (speciminibus raris subtus duabus aliis zonulis latis circumcinctis); spira elevata, apice subacuta, laevigata ; anfract. 5|, convexiusculi, 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; perislom. extus ac intus vivide castaneo coloratum, supra fragile, vix 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. |
