102 THEBA CARTUSIANA. 
The differences of texture and colour of the shell are exemplified by the 
specimens from the sandhills of Sandwich, which, as observed by Mr. 
L. E. Adams, are all thinner and much darker in colour than the individuals 
living upon the chalk lands. 
The traces of banding occasionally more or less clearly perceptible in 
this species are of the same origin and character, and admit of the same 
explanation as those of Theba cantiana and the Hygromia generally; they 
are vestiges of an ancient band system, whose pigment has gradually 
become diffused and confluent, and is now slowly tending to obliteration. 
The white somewhat calcified supra-peripheral zone is the division between 
the upper and lower group of bands, such as is now represented by the 
space between bands 3 and 4 in the Pentatzenia. 
VARIATIONS IN FORM OF SHELL. 
tT . : 
Var. conoidea Branczik. 
Helix euscepia (Bourg.), Servain, Mal. Lac. Balaton, 1881, p. 32. 
Helix tnnoxia Bourg. (in Locard), Prodr., 1882, pp. 72 and 316. 
SHELL with a somewhat raised spire. I have not seen the original description 
of this variety or its date of publication, but as it is the most suitable name and 
probably the oldest, I have adopted it. 
<= 
The sub-var. rubricollis Km. is of compact shape, Cs 
with elevated spire, and has rib and lip fawn coloured. 
The sub-var. euseepia is described as shell conical 
in shape and very compactly and tightly coiled, usually Fig. 152.—H. rubricoliis Km. 
of a yellowish tint, with the labial rib of a vinous colour. — Traynik, Bosnia, enlarged one- 
Diam., 14 mill. ; alt., 10 mill. aD: 
The sub-var. innoxia has a somewhat conoid spire, the last whorl rounded and 
scarcely deflected, and aperture almost semicircular. Diam, 15-16 mill. ; alt. 9 mill. 
CONTINENTAL DISTRIBUTION. 
France—All the shells found at Preste, Haute Garonne, in Aug. 1878 by Abbe 
Dupuy belong the variety which is equally globose above and below. 
Sub-var. innovia is recorded from the vicinity of Cannes and Nice, Alpes Mari- 
times, by Comm. Caziot, and also from Valence, Dréme. 
Italy—Sub-var. ewscepia was discovered in Naples by M. Bourguignat in 1859. 
Austro-Hungary—Sub-var. conoidea, Branezik, Travnik, Bosnia ! F. H. Sikes. 
Sub-var. ewscepia found on the shores of Lae Balaton, Hungary (Servain, l.c.). 
Sub-var. rubricollis, Travnik, Bosnia ! (Staudinger and Bang Haas). 
Var. depressa Pascal, Moll. Haute Loire, 1873, p. 38. 
Flelix ventiensis (Bourg.) in Fagot, Moll. Quatern., 1879, p. 4. 
Helix carthusiana var. sarriensis Martorell y Pena, Apunt. arqueol., 1879, p. 78. 
Helix sarriensis Bourguignat in Servain, Moll. Espagne, 1880, p. 52. 
Helix cantiana var. almonis Statuti, Bull. Soc. Mal. Ital., 1882, vol. viii., p. 31. 
Helix carthusiana var. ressmanni Clessin, Moll. Oester.-Ungarn., 1887, p. 134. 
Helix carthusiana var. depressa Caziot, Moll. Monaco, 1910, p. 92, pl. iv., f. 14. 
The var. depressa Pascal is described as of similar size to type form, but very flat 
above, and with a somewhat prominent keel. The sub-var. depressa Caziot is 
described as resembling the type-form, but much more depressed, and not so high 
= the spire; the mouth is also more compressed and longer. Diam., 12 mill. ; 
alt., 6 mill. 
\ 
Fic. 153. Fic. 154. Fic. 1598. 
Fic. 153.—Helix cartusiana var. sarriensts, slightly reduced (after Caziot). 
Fic. 154.—Helix cartusiana var. vessmianni, slightly reduced (after Clessin). 
Fic. 155.—Helix ventiensis, slightly reduced (after Caziot). 
The sub-var. rpessmanni is described as shell large, of a yellowish colour, whorls 
rapidly enlarging, and the last double the breadth of the penultimate, strongly 
striate, umbilicus more open. Diam., 19 mill. ; alt., 11 mill. 
