1880.] MR. CRAVEN ON NEW SHELLS FROM NOSSI BE, 215 



d'un roux moins intense. Bee noiratre, amaudibule inferieure beau- 

 coup plus claire que dans les adultes ; pattes jaunatres-pales ; iris 

 brun-fonce. 



Les CEufs, trouves dans les premiers jours de juin, sont allonges et 

 elliptiques, a surface fort polie, d'une belle couleur violette grisatre, 

 semblable a celle du chocolat au lait. Dimensions : 54 X 38 ; 55 X 38 ; 

 55x37*5; 55*5 x 373; 5Gx37"6mm. 



2. Description of three new Species of Land and Fresbwater 

 Shells from Nossi-Be Island (N.W. Coast of Mada- 

 gascar). By Alfred E. Craven, F.R.G.S., F.G.S,, 

 F.L.S., F.Z.S., &c. 



[E«ceivcd March 1, 1880.] 



(Plate XXII.) 



To the moUuscan fauna of Nossi-Be Island I have three new 

 species to add : — 



AcHATiNA MAMiLLATA, sp. nov. (Plate XXII. fig. 8.) 



Shell elongated, semitransparent, very pale greenish yellow, 

 faintly striated by the lines of growth ; apex mamillated and rounded ; 

 spire produced ; whorls 1 1, very gradually increasing, rather convex ; 

 aperture semilunar, labrum thin and simple ; columella rather 

 arcuate ; generic fold small ; suture deep and much puckered 

 beneath, excepting round the apical whorls, where it is coarsely 

 dentated. 



Dimensions: — Length 19 to 21 millims., diameter of last whorl 

 4"5, height of aperture 4, breadth of aperture 2'5. 



Locality. Nossi-Be Island, under dead leaves in woods near the 

 sea-shore. 



Pupa caf^eicola, sp. nov. (Plate XXII. fig. 10.) 



Shell subrimate, elongated, semitransparent, rather glossy, of a 

 pale yellowish-white colour, faintly obliquely striated, especially the 

 last whorl ; apex rounded and obtuse ; whorls 7, convex, gradually 

 increasing, the penultimate whorls being the broadest; the last 

 whorl not descending, but straightened a short distance from the 

 aperture ; aperture irregularly semioval, armed with three teeth, 

 viz. a thin lamelliform tooth on the paries connected with the 

 labrum at its upper margin, a broad-based tooth on the labrum also 

 reaching the margin, and a small tooth at the base of the columella 

 within the aperture; columella straight, furnished far within the 

 aperture with a lamelliform expansion ; deep depressions or pits on 

 the exterior of the shell correspond with the teeth on the labrum 

 and base of aperture ; labrum very slightly thickened, expanded 

 and somewhat reflexed ; suture coarsely dentated. 



