1880.] LAND-SHELLS OF MENTON. 107 



whorl in a very remarkable way ; umbilicus narrower, &c. I only 

 found a few specimens in deposit D. 



Diam. 9^, alt. apert. 3|, alt. 3^ (from apex to base of aperture) 

 millim. 



Type var. Indian Mus. Calcutta; also in coll. Williams. 



Hyalina fodereana, Bourg. MS. 



I will not attempt to describe this species, as it is too close to 

 many species of the group of Hyalina lucida, Mauneri, <fec., several 

 of which I do not possess for comparison ; I will only say that the 

 species is everywhere abundant in deposits A, B, C, D, with the 

 preceding, from which it is undoubtedly quite distinct. We did not 

 find recent specimens of this form. 



Alt. .5^, diam. 12|- ; apert. alt. 4f, lat. 6 millim. 



M. Bourguignat informs me that I sent him some recent specimens 

 from Menton ; but they were certainly not identical with this subfossil 

 species. 



Hyalina, sp. ? 



A small species of five whorls, apparently full-grown, of which I 

 found some half dozen specimens in deposit F only. It is a little 

 more narrowly umbilicate than young Hyalina maceana of the same 

 size ; the whorls increase very gradually and regularly, the last one 

 not being dilated. 



Alt. 3\, diam. 7 millim. 



Indian Museum, Calcutta, only. 



Hyalina mentonica, n. sp. (Plate XIII. fig. 3.) 



T. parva, spira elevata, anguste perforata, subobsolete striatida^ 

 cornea, nitida ; anfract. 6, convexiusculi, reyulariter pergrada- 

 timque crescenfes, ultimo paulnlum compresso, prope aperturam 

 angu&to (Jiaud dilatato), basi convexo ; aperturafere rotunda, 

 marginibiis regulariter rotundatis ac subincrassatis. 

 Alt, 3^, diam. 5f millim. 



A pretty little species, quite unlike any I know, and also unknown 

 to M. Bourguignat. Mr. Williams found one or two recent speci- 

 mens at Saiute-Agnes, about 2500 feet. It is a true Hyalina, and 

 does not belong to Vitrea ; the very narrow last whorl, not dilated 

 at all, the narrow perforation, rounded aperture, elevated spire, &c. 

 well characterize it. The figure is not good, and the shell has been 

 since accidentally broken. 



Type, Indian Museum, Calcutta. 



Hyalina (Vitrea) tenebr^ria, Bourg. MS. 



I will not attempt to describe this small form of a most dithcult 

 group, for which I have not at the moment the proper material 

 available. It is an imperforate species, with remarkably excavated 

 base. It was rather scarce (subfossil) in deposits A, B, and D. 

 M. Bourguignat informs me he possesses recent specimens of the 

 species from a grotto near Grrasse. 



