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Show 108 MR. G. NEVILL ON THE [Feb. 17, ARION HORTENSIS, Miiller. A few specimens from just outside the town. ARION AUSTENIANUS, n. sp. I am indebted to M. Bourguignat for the information that the above is a new form. I found a few specimens near the village of Grimaldi, at about 1000 feet elevation. LEUCOCHROA CANDIDISSIMA, Drap. A small form is extremely abundant throughout the submaritime zone ; specimens more or less scalariform (that is, with the whorls subdetached) are by no means rare ; it is as often narrowly rimate as imperforate. I was astonished not to find the genus at all a little further eastwards at Alussio. Alt. 12g, diam. 16| millim. HELIX (GONOSTOMA) OBVOLUTA, Miiller. Not uncommon in deposits A, B, C, D, varying in the more or less open umbilicus. I found a single subfossil specimen at Roque-brune, zone oi Helix paretiana ; we did not find it living ourselves in the neighbourhood ; but there were recent specimens in the Museum from the Turin valley (some 2000 feet). It is also recorded by Risso. Alt. 6f, diam. 14 millim. Deposit A. Umbilicus very open. Alt. 6, diam. \2\ millim. Deposit D. Umbilicus less open. HELIX (PATULA) ABIETINA, Bourg. (Malac. Alger. 1864). Rare, subfossil, in deposit B only. Alt. 2\, diam. 6 millim. HELIX (PATULA) RUPESTRIS, Drap. Rather scarce towards the base of the Grimaldi Hill; also subfossil in deposit F only. HELIX (PATULA) PYGMCEA (?), Drap. Not uncommon in deposit B. Unfortunately I do not know the species of this group sufficiently well to be sure of my identification. HELIX (TACHEA?) PARETIANA, Issel (Att. Acad. Torino, 1867; Verezzi, alt. 32, diam. 42 mill. =2/". monaecensis, Rambur, Journ. Conchyl. 1868 and 1869, Monaco). Here and there we found remains of this gigantic extinct Helix all along this part of the Riviera; but in the " Couche marneuse" of Cape Mortela only were the specimens sufficiently well preserved to be worth keeping ; and even there we only found one or two poor specimens, until my friend got some quarrymen to lower him, with a rope, some way down one of the remarkable clefts or chasms (many hundred feet often in depth) that everywhere cut through this " Couche marneuse." Unfortunately he took such a fancy to this fine Helix that he would not touch any other shell during his descent, |