PERUSSACIA. 221 



The Madeiran form has been called Loved wollastoni by Wat- 

 son, but no characters separating it from European folliculus 

 have been indicated, though it may prove that the coloration 

 of the soft parts is different. Wollaston thinks that it may 

 have been imported from Portugal. 



Numerous varieties have been described; what their value 

 is I cannot say, but all published information is here given. 



Var. denarensis De Gregorio. Corneous yellow, similar to 

 F. biondiana Ben., but a little larger, the aperture less pro- 

 duced forward, a border along the suture, and the columellar 

 lip is thickened. It differs from vescoi by the less regularly 

 conic spire, want of a columellar fold, and the presence of a 

 sutural border. Scorcia Denaro, near Palermo, at the little 

 bridge of the Pagliarelli. (Ferrusacia folliculus Gmelin var. 

 denarensis De GREG., II Naturalista Siciliano xiv, 1895, p. 

 207). 



Var. abbreviata Lowe. "Length 9, diam. 3%, aperture 4 

 mm. long. Near Mogador, at the Emperor's Garden, up the 

 river. Agrees with Portuguese better than Madeiran speci- 

 mens in the more prominent columella" (Lowe). Probably 

 identical with vescoi. 



Var. products Lowe. Length 10, diam. 3%, aperture 4 

 mm. long. Differs from abbreviate only in the spire being 

 longer in proportion to the aperture, and in the less promi- 

 nent or developed columella. In this latter point it agrees 

 with Madeiran better than with Portuguese examples" 

 (Lowe). Rabat, Morocco, a single specimen, Mrs. Elton. 

 (Achatina folliculus var. &, abbreviata, and var. b. producta 

 LOWE, Journal of the Proc. of the Linnean Society, Zool. v, 

 1861, p. 203.) 



Var. pulchella Moquin-Tandon. "Shell smaller, narrower, 

 the aperture comparatively larger. Cette, Nimes and Mar- 

 seilles (Moq., Hist. Nat. Moll, de France ii, 1855, p. 307, pi. 

 22, f. 30). 



Var. amauronia Bourguignat. (PI. 41, figs. 57, 58). 

 Cylindric-oblong, ventricose, glossy, subpellucid, smooth, cor- 

 neous-buff ; spire obese, the apex obtuse; whorls 5 l / 2 , a little 

 convex, regularly increasing, separated by a paler margined 



