ISO
guished by its size, being the. largest of all the species. I t is still
found alive in considerable numbers, feeding upon the cabbage trees»
tree» ferns, and native vegetation generally in the damp, cool
region on the high" central ridge, at an altitude of 2600 feet above
thè sea.
Zonites, Gray.
Z. cellaring, Mull.—This native of the British Isles has'
probably been introduced through the agency of the earth contained
in . Ward’s cases of plants. I t is easily recognised, being a small,
flat, spirally-formed snail, very abundant in gardens, where it assists
the common garden snail with, its voracious aptitude for the destruction
of young vegetation.
Z. alliarius, Miller.—-Another British species, found commonly
associated with the other.
Helix j
H. MisIL Striti»»?! creature, the
Common Garden Snail, is abuiìuàci ¿ài over t h e , Island and has
without- doubt, been introduced in the earth contained in Ward’s
,cases of plants. I t exists in largc numbers on the somewhat barren
plains of Longwood and Prosperous Bay, where it finds a cool and
moist atmosphere as well as food amongst the' creeping plants of
the Hottentot Fig (Mesemlrya.nthem.mn edule). In the hot season,
when- those plants partially die away, the empty snail-sheìls may be
gathered from beneath them by hundreds.
• *H. p o ly o d o n , G. B. Sow.=H. Alexandri, Forb,—A small
shell now found, together with the following five species, all of which
are natives of the Island, in a subiossil state, embedded m the
surface-soil on the north-eastern quarter of the Island, at an altitude
above the sea of 1200 to loffi) feet. Described and figured
“ Proceed. Geoi. Soe.,” March 10, 1852, p. 198, pi. v. f. 9 ; also in
Mr. Darwin’s work on Volcanic Islands.
H. h e le n e n s i s , Forb.—A small, round, whitish-brown,
spirally-formed shell, of a Pacific type, from the roadside banks o k
Side-Path above The Briars.
*H. cu tteri, Pfr.—A smaller species than the last, but found
associated-with it.
tn near Flagstaff Hill ; altitude
in. the appendix to Mr. Darwin’*
*H. gpurca, G. B. Sow.— Fr
above the sea 1600 feet. Describe
HELTSIBA -SAMCTJL HELEN.®. p. 11$. ( fM s iix ).
BULIOTS ANRIS W L F IN A . p. « / . (hU m é.).
■ CRAB CABHT AT BREAKNECK. VALLEY. p. Z06.
E.VJtòliiison.lith.-
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