134 MR. G. NEVILL ON THE [Feb. 17, 



Var. SUBFOLLICULUS. 



? Ferussacia folliculus, Gronovius (as figured by Bourg. Mai. 

 Chateau d'lf, pi. ii. fig. 2 ; long. 9, diam. 3 millim.). 



A few specimens only met with living with typical F. gronoviana ; 

 they agree well with the above-quoted figure. The body-whorl is 

 more elegantly and evenly rounded, not tumid towards the base, 

 and appears longer in prof)ortion tiian in the typical form. 



Long. 9, diam. 3^ millim. ; apert. alt. 3| millim. 



Var. SUBFORBESI. 



1 Ferussacia forbesi, Bourg. Mai. Alg. (long. 8^, diam. 4 millim. 

 Algiers). 



I doubt this variety, in especial, being specifically distinct. The 

 whorls of the spire are only slightly irregular ; the last whorl more 

 convex, columella straighter. Tliere is also a smaller form, of which 

 I found only two specimens (of which I also give measurements 

 below), which might be separated again as distinct. The aperture 

 is very small. 



Long. 8|, diam. 3| millim., et long. 8^, diam. 3^ millim. 



Long. 7\, diam. 3 millim. (A small form, perhaps distinct). 



All the preceding in Indian Museum, Calcutta. M. Bourguignat 

 informs me by letter that I sent him, from Menton, specimens of 

 Ferussacicc vescoi, amblya, procchia, forbesi, and abromea. He does 

 not mention F. gronoviana. 



Ferussacia (?) abnormis, n. sp. (Plate XIV. fig. 3.) 



T. parva, subpyriformis, laevigata, nitidissima , vitrea et hyalina ; 

 apice obtusiiiscnlo ; anfract. 4 {aut 4j), regulariter crescentes, 

 primi 3 parvi, ullimus supra per tumidus, infra subrotundatvs ; 

 apertura magna, margine externa hand incrassato, regiduriter 

 paululum convexo ; columellari hand calloso, valde intorta. 

 At Blida, in Algeria, under a large stone in company with a species 

 oi Ferussacia (the latter with bright-greenish-yellow-coloured animal), 

 I found a single specimen of what I took to be the young ot a 

 hyaline variety. It struck me at the time that it was of a more 

 tumid shape than ordinary young specimens. Unfortunately I have 

 not this shell available for examination at the present time. At 

 Menton I was much astonished at finding among a lot of F. grono- 

 viana (which also possesses a greenish-yellow animal) another, as I 

 thought, young hyaline specimen, also of more tumid form. Un- 

 fortunately I took no especial note of the animal, except that it was 

 of a pure hyaline white. On examination of the shell, after death of 

 the animal, I was astonished to find the twisted fold of the columella 

 of a totally distinct nature from that of F. gronoviana and its 

 varieties in all stages, so much so that I am inclined to believe 

 that anatomical examination will comjiel the separation of this 

 species from the true Feriissacice. The margins of the aperture not 

 being tliickcned leaves it a matter of doubt whether the shell is full- 

 grown. I am strongly of that ojiii.ion myself, but acknowledge it 



