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Show 1880.] LAND-SHELLS OF MENTON. 99 cave. Within the cave itself I only detected two shells in original position ; they fortunately further confirm my view, as they were attached to a small ledge against one of its walls, well inside the cave, and near its present floor. The bones have been dug out by M . Riviere &c. from a depth above them of about 6 feet. One wa's the species of Trochus already mentioned as found outside, the other a fine specimen of the distinct and well-marked variety of Pupa 5-dentata, which I found in abundance in deposit F, and which I shall hereafter describe as P. (Torquilla) ^-dentata, var. speluncarum. I will conclude by pointing out that M. Riviere himself speaks of the land-shells he came across mixed up with the large bones of extinct animals in these caves; indeed it was this remark that first led me to search for these subfossils. From the memoirs of M . Bourguignat (' Note compl. sur quelques Mollusques et Mammiferes decouverts dans une Caver ne pres de Vence,' 1868, and 'Revue et Mag. de Zool.' 1877, pp. 11-17), and from those of Prof. Issel ('Delle Conch, nelle Breccie &c. della Liguria occidentale,' 1867), and of Mons. Bambur ('Journ. de Conchyl.' 1868, p. 265), as also from the present researches by Mr. Coombe Williams and myself, the conchological fauna of Menton, in the early part of the Quaternary epoch, appears to have been especially characterized by numerous striking forms of Tachea (some of which present some of the features of Macularia and seem to me to form a connecting link between the two subgenera), by species of Campylcea and Fruticicola (section Zenobia), by numerous species of Hyalina (Euhyalina and AEgopina), Clausilia (Delima and Iphi-genia, sect.), Pupa (Torquilla, Sphyradium, Orcula, and Pagodina), by the two forms Cyclostoma physetum and C. lutetianum (quite distinct from C. elegans), Pomatias, sp., and the largest as yet known Acme and a new form, allied to it, which I am about to describe as anew genus ("Renea ") ; lastly, by species of Daudebardia, Testacella, Limax, &c. Several of the genera, or subgenera, now abounding in the district do not seem to m e to have existed then-Xerophila, Cochlicella, Eu-parypha, Leucochroa, Succinea, Rumina, and Ferussacia. It is true there are great doubts as to several of them. Issel mentions having discovered a unique subfossil Ferussacia at Capo Zoppa; Mr. Coombe Williams also found a single specimen, subfossil in his opinion, at Menton. Personally I doubt very much that either of the specimens belong to this early period ; I think, at the oldest, they belong to the zone of H. paretiana. The same remark applies to Rumina, of which I found one or two fragments in doubtful position, and which Issel also mentions in his above cited work. Xerophila appears considerably more doubtful, even, than either of the preceding. Bourguignat mentions a species from the cavern of Vence. I myself found numerous specimens of various new species (allied to X terveri), not only immediately associated with H. pare- |