FERUSSACIA. 223 



"Partaking chiefly of the characters of A. maderensis and 

 A. producta Lowe, this elegant little species of which I found 

 a single example at the picturesque spot already so often men- 

 tioned, called the Emperor's Garden, about four miles from 

 Mogador up the river, is perfectly distinct from each; and it 

 will not even enter into either of the groups to which they 

 respectively belong, appertaining properly to that of Achatina 

 folliculus (Gron) . In shape both of the shell and of its aper- 

 ture it most resembles A. maderensis Lowe; but it wants the 

 peculiar bright polish ; it is twice as large ; the spire is much 

 less blunt, with flatter volutions and a shallower, more oblique 

 suture; the pillar-lip is more dilated and prominent at the 

 base ; and lastly, the peristome is not obtuse or thickened and 

 colored. From all the other allied Madeiran species it differs 

 in its cylindric shape and short ovate aperture, simply acute, 

 and not narrowed or acuminate at top. It is also a consider- 

 ably larger shell than A. gracilis and A. leacociana, Lowe, 

 to which, amongst these other species, after A. producta, 

 Lowe, it most approaches ; and from A. producta, Lowe, with 

 which in shape and size it best agrees, it is abundantly distinct 

 by the form and proportionate size of the aperture, besides 

 the much less prominence of the pillar at its base. From 

 A. folliculus (Gron.) it differs in the narrow turreted-cylin- 

 dric shape, the short ovate aperture, and the perfectly even 

 and regular volutions (without any turgidness in the penul- 

 timate volution) of the spire." (Lowe.) 



Pallary's figures of topotypes are copied. 



3. F. CASTROIANA Locard. 



Shell of an almost regularly cylindric-elongate shape, taper- 

 ing only at the two ends; spire short, the summit large and 

 obtuse, composed of 5 or 6 feebly convex whorls, the first 4 

 increasing slowly and regularly, the last very large, quite 

 cylindric above and throughout its length, not tapering ex- 

 cept towards the base. Suture well marked, nearly horizon- 

 tal in the upper whorls, a little oblique from the beginning of 

 the last whorl above the angle of the aperture. Aperture ex- 

 cised, long and narrow, contracted and angular above, a little 



