1875. ] MR. R. J. L. GUPPY ON HELIX COACTILIATA. 321 
Cyclotus translucidus, Sow. Venezuela. 
Helicina barbata, Guppy. Carupano (Venezuela). 
lamellosa, Guppy. Venezuelan Guiana. 
When these nine species are added to those contained in the first 
list, we have twenty-five as the number of species ascertained to be 
common to Trinidad and the adjoining continent. 
The list of species remaining as peculiar to Trinidad, so far as is 
yet known, includes the following :— 
Glandina minutissima. Ancylus textilis. 
Spirazis simplex. Gundlachia crepidulina. 
Zonites implicans. Planorbis meniscus. 
-—— umbratilis. Amunicola spiralis. - Jaw 
Hyalina alicea. Diplommatina hatttont. » 2+ 
Helix caca. — Jove wie Blandiella reclusa. 
Bulimus pilosus. Cistula aripensis. 
Bulimulus aureolus. Helicina nemoralis. 
Pupa uvulifera. ; ignicoma. 
Simpulopsis corrugatus.-Ny «4  Cyclas punctifera. 
Amphibulima felina. Anodon leotaudi. 
This list contains the names of twenty-two species. To it might 
be added Stenogyra coronata and Pupa auriformis; but as hitherto 
only a single specimen of each has been found, they may be regarded 
as doubtful; and the same reason may be given for leaving out 
Autonoé riparia. 
On examination of this list the number of really peculiar forms 
seems to be very few. Many of the shells whose names are here 
included are minute, and most occur only in very restricted localities ; 
so that even if existing in the Antilles or on the continent they might 
easily have escaped notice. Glandina minutissima is perhaps the 
smallest of all known land-shells, unless Achatina iota of Adams 
(to which our species seems to be allied) should prove to be less in 
size. Spiraxis simplex is akin to some of the plainer forms of Sprazis 
found in the West Indies. The two Zonite are minute. Hyalina 
alicea may prove to be a Macrocyclis, as has happened in the case of 
H. concolor (baudoni). Bulimus pilosus is allied to B. constrictus, a 
Venezuelan shell, of which a variety is described in a note commu- 
nicated by me to the Society. Pupa uvulifera is a small species 
belonging to a type of world-wide distribution. Simpulopsis is a 
South-American genus, having one or two species in the Antilles. 
It is probable that S. corrugatus will be found in Venezuela, if 
indeed it is not identical with one of the species already described 
from South America. Amphibulima (Omalonyx) felina is very 
close to, if not identical with, O. unguis of Guadeloupe. There is 
some doubt about the identity of the latter with the South-American 
O. unguis. Of Ancylus teatilis, Gundlachia crepidulina, and Plan- 
orbis meniscus it may be said that they will probably be found in 
South America on search; and Amnicola spiralis may be placed in 
the same category. Furthermore the latter is not easy to distin- 
Proc. Zoou. Soc.—1875, No. XXI. 21 
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