157 
HELIX globosus. 
TAB. CLXX. 
Spec. Char. Globose, slightly elongated, obscurely 
transversely striated ; whorls but gradually 
increasing in size; outer lip reflected. 
F rom the gradual increase in size of the whorls, the last of 
which is not remarkably larger than the preceding, joined 
to the slight convexity of their exposed parts, the shell 
assumes a globose aspect although it is not strictly sphe- 
rical. The young ones are rather depressed, and have 
an umbilicus ; the old ones are slightly elongated, and 
have the umbilicus concealed by the expansion of the inner 
lip. The lines of growth are distinctly marked: the 
transverse striae irregular, numerous, hollow, and so su- 
perficial, that they are only to be seen in the best pre- 
served specimens. 
Specimens of this shell were presented to me by John 
Holloway, Esq. who found them at Shalcombe, on the 
Isle of Wight, where it is of rare occurrence. From its 
exact resemblance in generic characters to the Helix 
pomatia, it must be considered like it, to be a land snail 9 
and should seem to have been accidentally imbedded with 
the water shells in the calcareous (now stoney accumula- 
tion) that has preserved them, and often filled their inte- 
riors : the shell has been replaced by crystallized Carbonate 
of Lime. I have been favoured with specimens of the 
Genus Phasianella in the same state of preservation^ 
from the same rock. The rock is a compact Limestone^ 
breaking with a smooth conchoidal fracture, and contains 
but a few fragments of shells; it is much harder than 
chalk, or even Portland stone, but softer than the Pur ’ 
beck stone or mountain Limestone. 
