a 
380 HELIX PISANA. 
° 
Morocco—Mogador, collected by Lient.-Col. Parry ! G. Kk. Gude. 
Algeria—Snub-var. a/tw, Algiers (Coll. Locard, Mus. d’Hist. Nat., Paris). Sub- 
var. couturieri, Algeria (Let. & Bourg., op. cit.). 
Tunis—Sub-var. a/fa, rather rare, Klroumirie (Germain, l.c.). A large form of 
sub-var. chambardi (var. maxima Let. & Bourg.), is recorded from Rades, and 
sub-var. byrse from Rades near the mouth of the Oued Meliana and among the 
ruins of Carthage (Let. & Boure., op. cit.). 
Egypt—Sub-var. thinophila, Egypt, and sub-var. chambardi, dunes of Ramleh 
near Alexandria (Let. & Bourg., op. cit.). 
Madeira—Little Salvage, T. V. Wollaston ! J. Cosmo Melvill. 
Azores — Specimens labelled ‘‘ var. frochiforme Furtado, St. Michael,” and 
received from d’Arruda Furtado, are in the collection of Leeds Philosophical Society. 
Var. depressa Requien. 
Fleltx pisana var. depressa Requien, Cat. Moll. Corse, 1848, p. 44. 
Helix pisanella and oltvarest Servain, Prodr. Mal. Tunis, 1887, pp. 80, 83. 
Helix cuttat? Bourguignat, op. cit.. 1887, p. 80. 
Helix monrot, gergtsensis and salemensis Let. et Bgt., op. cit., p. 84. 
Helix levesquet Berthier, op. cit., pp. 80, 83. 
Helix barbosana Locard, Conch. Portug., 1887, p. 52. 
Heltx pisana var. fata Monterosato, Ms. 
The var. depressa is described as more depressed, periphery slightly angulate. 
This may be the Carocolla maculata of Menke, which is described as depressed 
and more or less carinate, and has been considered as a variety of H. pisana. 
Fic. 427. Fic. 428 Fic. 429. Fic. 430. 
Fic. 427.—Helix pisana var. depressa Reqg., Tenby. South Wales, Mr. A. G. Stubbs. 
Fic. 428.—Heliv pisana sub-var. data Monts., Ascoli-Piceno, Italy, Marquis Monterosato. 
Fic. 429.—Helix pisana sub-var. barbosana Locard, Nimes, Gard (Mus. Hist. Nat. Paris). 
Fic. 430.— Helix pisana sub-var. monroi Let. et Bourg., Limoux, Aude (Mus. Hist. Nat. Paris). 
The sub-var. lata may be deseribed as uniformly whitish in colour, large, 
and depressed, with body-whorl laterally expanded. Diam. 24 mill. ; alt. 16 mill. 
This variety has been assuined to be probably identical with the H. alibrandi 
of Rigacei (Catal., 1874, no. 2649) recorded from Civita Vecchia near Rome. 
The sub-var. pisanella is the most depressed form, with a large ultimate whorl, 
and the angulation placed somewhat high on the whorl. Diam. 15-18 mill. ; alt. 
10-11 mill. (See Monogr., pl. xxxi., f. 15). This form is very variable and may be 
variously banded or bandless with a whitish or yellowish ground tint. 
The sub-var. barbozana has been described as differing chiefly from the type in 
its more depressed spire. It may be uniformly whitish or variously banded. 
The sub-var. salemensis is described as a well depressed and solid shell with a 
large and angulate body whorl. Diam. 17 mill. ; alt. 11 mill. 
The sub-var. levesquei is of a depressed shape, opaque, and cretaceous, with a 
peripheral angulation. Diam. 16 mill. ; alt. 105 mill. 
The sub-var. monroi is closely related to sub-var. euftat:, but is more convex, 
and the last whorl is more distinetly keeled. 
The sub-var. euttati is depressed in shape, with a very median angulation, and 
is often uniformly whitish in colour, but is also variously banded and even albine 
(See Monoer., pl. xxxi., f. 14). 
The sub-var. gergisensis, though somewhat globose, has a depressed spire, and 
the body whorl angulate. The swollen body whorl separates it from the sub-var. 
salemensis. Diam. 18 mill. ; alt. 13 mill. 
The sub-var. Olivaresi has never been described or figured. 
MM. Letourneux and Bourguignat arrange the depressed Tunisian forms of the 
species in three groups or series : 
Helix pisanella, H. levesquei, H. salemensis, and H. gergisensis are classed as 
very depressed and carinate forms with ample ultimate whorls. 
Heliv subpisana, H. agaroi and H, olivaresi as depressed with ample body whorls. 
