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Show 134 MR. G. NEVILL ON THE [Feb. 1 7, Var. SUBFOLLICULUS. ? Ferussacia folliculus, Gronovius (as figured by Bourg. Mai. Chateau d'lf, pl. 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 proportion than in the typical form. Long. 9, diam. 3} millim. ; apert. alt. 3| millim. Var. SUBFORBESI. ? 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. There 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. 7f, 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 Ferussacice vescoi, amblya, procchia, forbesi, and abromea. He does not mention F. gronoviana. FERUSSACIA (?) ABNORMIS, n. sp. (Plate XIV. fig. 3.) T. parva, subpyriformis, lavigata, nitidissima, vitrea et hyalina; apice obtusiusculo ; anfract. 4 (aut 4}), regulariter cresccntes, primi 3 parvi, ultimus supra pertumidus, infra subrotundatvs; apertura magna, margine externo haud incrassato, regulariter paululum convexo ; columellari haud 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. gronoviana (which also possesses a greenish-yellow animal) another, as I thought, young hyaline specimen, also of more tumid form. Unfortunately 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 compel the separation of this species from the true Ferussacice. The margins of the aperture not being thickened leaves it a matter of doubt whether the shell is lull-grown. I am strongly of that opinion myself, but acknowledge it |