HELIX PISANA. 385 
Var. albida Moquin-T'andon. 
Helix pisana var. albida Moquin-Tandon, Hist. Moll. Fr., vol. ii., 1855, p. 260. 
Helix agaro! Servain, Prodr. Mal. Tunis., 1887, p. 80. 
Heltx bocagei Lecard, Conch. Portug., 1899, p. 5). 
Helix pisana sub-var. thalassophila Monterosato, Ms. 
SHELL dull whitish, with the lip and parietal wall of a creamy or brownish tint. 
The var. alba of Shuttleworth (Moll. Corse, 1843, p. 15), described as ‘‘entirely 
whitish or very pale yellowish” would appear to embrace the vars. concolor and 
albida. 
The var. alba of Jeffreys, as described by that author (Brit. Conch., 1862, vol. i., 
p. 208) also includes this variety, as well as the albine form. 
Fic. 435. Fic. 436. Fic. 437. 
Fic. 435.—Helix pisana sub-var. bocage? locard, Lisbon (Mus. Hist. Nat. Paris). 
Fic. 436.—Helix pisana sub-var. thalassophila Monts., Palermo, Sicily, Marquis Monterosato. 
Fic. 437.—Helix pisana sub-var. agarot, Let. & Bourgt., Lisbon (Mus. Hist. Nat. Paris). 
The sub-var. boeagei is subdepressed, with a broadly conical spire, and is of an 
uniformly whitish colour. Diam. 20 mill. ; alt. 15 mill. 
The sub-var. thalassophila is described as subconoidal and somewhat solid, of 
an uniform whitish colour, sometimes with a rosy lip. Diam. 19 mill. : alt. 14 mill. 
The sub-var. agaroi is subdepressed, with a very slightly risen spire, and very 
ample last whorl. It is usually uniformly whitish. Diam. 20 mill. ; alt. 15 mill. 
It differs from sub-var. swbpisana in its more compact shape, larger, loftier, and 
more sloping last whorl], and indistinctly rectangular profile. 
ENGLAND AND WALES. 
Channel Isles—In Guernsey it has been found on the sea-wall, Vazon Bay, by 
Mr. Hugh Wyndham, and recorded from Bordeaux Harbour and about Vale Castle 
(Lomlin and Marquand, Journ. of Conch., x., p. 289). Greve d’Azette, Jersey, 1905 ! 
I, H. Sikes. 
Pembroke—Common, Wreck field, Tenby ! G. 8S. Tye. Common at Giltar, 
Caldy Island, and about Tenhy, A. G. Stubbs. 
Glamorgan—Abuniant on the Burrows, Swansea, 1874, R. Rimmer. 
IRELAND. 
Louth—Drogheda, 1904 ! P. H. Grierson. 
Meath—Julianstown, Dr. R. F. Scharff. 
Dublin—Sandhills, Rush, Sept. 1885 ! J. R. Redding. 
FOREIGN DISTRIBUTION. 
France—Grasse, Alpes Maritimes, Hugh Watson. Zamaris, Var; Rueil near 
Paris, Seine-et-Oise, 1902! and Roquefavour, Bouches-du-Rhone ! P. Dautzenberg. 
Perpignan, Pyrénées Orientales ! G. K.Gude. Cucuron, Vaucluse, J. R. le B. Tomlin. 
Recorded by Dubrueil from Montpellier, Lunel, Béziers, and Lodéve, Hérault ; and 
as var. alba from Corsica by Shuttleworth (Moll. Corse, 1843, p. 15). 
Italy—Lido, Venetia! P. Dautzenberg ; and Girgenti, Sieily ! G. K. Gude. Sub- 
var. thalassophila, Mondello, near Palermo, Marquis Monterosato. 
Spain—Toledo, New Castile ! Rev. W. C. Hey; Barcelona, Lieut.-Col. Parry ; 
Mahon, Balearic Isles! P. Dautzenberg; and Neutral ground, Gibraltar ! R. D. 
Darbishire. Sub-var. agaroi, Spain (Let. & Bourg., op. eit.). 
Portugal—Sub-var. agaroi, Lisbon, Dr. Germain. Sub-var. bocagei is recorded 
from Oporto, Faro, and Lisbon by Prof. Hidalgo. The uniformly whitish variety 
is the dominant form in Portugal. 
Madeira— Porto Santo ! G. K. Gude. 
Azores—F lores ! G. K. Gude. 
Morocco—'l'angiers ! G. K. Gude. 
Algeria—Algiers ! P. Dautzenberg. 
Cape Colony—Var. a/bida is one of the most abundant forms on Robben [sland 
(Swanton, Journ. of Conch., vol. x., p. 194). 
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