™, 
186 PYRAMIDULA ROTUNDATA. 
other observers he cites Veistrup Aa and Oxnebjerg in Funen; and for 
Jutland, Neder Knaberup in Ribe Stift, and Stampeimollen and Skander- 
borg in Aarhus Stift. 
Variation.—This very distinct and handsome species varies somewhat 
in shape, size, and colouring, but little variation has been observed in 
the strength and character of the sculpture of the shell, although a var. 
infracostata is cited in Tryon’s Manual of Conchology, presumably a 
modification in which the ridging is more prominent in the basal region. 
The rust-red flammular markings which, though occasionally absent, 
are so distinctive a feature of the species, are especially distinct in young 
shells, and this, the type form, is regarded as a var. vulgaris by Dumont 
and Mortillet. 
Dr. Kobelt gives H/. megerlet Mabille and HZ. omalisma Bourguignat as 
mere varieties of P. rotundata, and doubtless there are many other forms 
figuring under other names which should be relegated to this species. 
Specimens inhabiting elevated spots in Savoy, which, owimg to some 
peculiarities of their environment are dwarfed in size and _ partially 
denuded of epidermis, have been distinguished as a var. detrita by Dumont 
and Mortillet. 
War: abietina-Bonpnignat VARIATION IN FORM OF SHELL 
Helix abietina Bourguignat, Mal. Alg., 1864, p. 179, pl. xix., ff. 17-20. 
SHELL smaller, with a narrower UMBILICUS; less angulate WHORLS; more 
compressed and lamellate transverse RIBS ; and a proportionately larger last whorl. 
Diam. 5 mill. ; alt. 23 mill. 
This variety is considered by its author as quite intermediate between P. 
rotundata and P. ruderata, but can only be really confused with P. rotundata, 
of which it is the representative in Algeria. 
Fic. 240.—Helix abietina Bourguignat, natural size and enlarged (after Bourguignat). 
Italy—S. Croce in Gerusalemme, Rome ; Ayellano and Maielletta in Abruzzi; 
Camporotonda in Umbria; and about Aritzo in Sardinia. 
Corsica—Recorded by Dr. Scharff from St. Florent. 
Algeria—Rare under leaves, stones, ete., at the foot of trees in nearly all the 
forests of the mountains of Kabylia (Bourguignat, 1.c.). According to Lallemant, 
it has been found in the alluvium of the Harrach, probably derived from the hills 
of Oued-Djeinma, where it lives under decayed wood. 
Var. turtonii Fleming. 
Helix votundata Turton's Conch. Dict., 1819, p. 53. 
Flelix Turtonii Fleming, Brit. Anim., 1828, p. 269. 
Helix rotundata var. depressa Picard, Moll. Somme, 1840, p. 239. 
flelix votundata var. complanata Picard, l.c. 
SHELL greatly depressed, spire nearly flat. 
The sub-var. depressa of Picard is described as 
having a very slightly risen spire, and with the obsolete 
peripheral keel placed higher than in the type. IMeOl WL eee 
The sub-var. eomplanata of Picard is described as /tonéi Fleming, x3. (Hess 
quite flat above, with the peripheral angularity placed Yorks.» Mr. J. D. Butrerell). 
higher than in the sub-var. depressa, and the mouth as transversely depressed. 
This is not, however, the Helix rotundata var. depressa of Férussac (Hist. Nat., 
pl. 79, f. 5), which is probably the Helix solaria of Menke. 
$< )\)\ ‘ . 
