108 MR. G. NEVILL ON THE [Fcb. l/j 



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. 16g miUim. 



Helix (Gonostoma) obvoluta, Miiller. 



Not uncommon in deposits A, B, O, U, varying 'in the more or 

 less open umbilicus. I found a single subfbssil specimen at Roque- 

 brune, zone o^ 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 

 Kisso. 



Alt. 6f, diam. 14 millim. Deposit A. Umbilicus very open. 



Alt. 6, diam. 12^ millim. Deposit D. Umbilicus less open. 



Helix (Patula) abietina, Bourg. (Malac. Alger. 1864). 



Rare, subfossil, in deposit B only. 

 Alt. 2j, diam. 6 millim. 



Helix (Patula) rifpestris, Drap. 



Rather scarce towards the base of the Grimaldi Hill ; also sub- 

 fossil in deposit F only. 



Helix (Patula) pygtama. (?), 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 mi\\.=H. 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 Mnrtela 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 throiiyh tliis 

 " Couche marneuse." Unfortunately he took such a fancy to tiiis fine 

 ReJix that he would not touch any other shell during his descent, 



