318 MR. R. J. L. GUPPY ON HELIX CoacTILtaTA. [Apr. 20, 
«They were apparently male and female; but their sex was not 
determined by the preserver. 
«‘The cock is distinctly spurred, the general colour of the plu- 
mage being green and brown with bright metallic reflections. He has 
no sign of crest nor any trace of the pencillings of the Silver 
Pheasant. 
‘<The hen is spurless, her general colour light mottled brown ; the 
tail long and pointed and meshed, with transverse bars closely re- 
sembling those of the Scemmerring’s Pheasant ; a small pendent crest 
proceeds from the occiput.” 
The following papers were read :— 
1. On the Occurrence of Heliz coactiliata in Trinidad ; with 
Remarks on the Distribution of the Land and Freshwa- 
ter Mollusca of that Island. By R. J. Lecumere 
Guppy, F.L.S., F.G.S., &c. 
[Received March 30, 1875.] 
Helix coactiliata was described by Férussac in the ‘ Histoire des 
Mollusques,’ vol. i. p. 18, and figured on the 72nd plate of that 
work (figs. 1-5). Férussac remarks of it ‘ Petite espéce discoide, 
dont le port se rapproche un peu de celui de quelques espéces 
d’Europe.” Reeve also figures the shell in his Monograph of Heli, 
No. 595, and gives H. nystiana as a synonym. Mr. Ralph Tate, 
F.G.S., collected land-shells in Venezuelan Guiana in 1869; and 
amongst them was a Helix which, on comparison with specimens in 
the British Museum, I found to be Helix coactiliata. Comparing 
them with Férussac’s and Reeve’s figures I do not observe any 
essential difference, though our specimens may be a little larger than 
those figured. I am told, however, that the Venezuelan shell has 
been determined as H. parkeri of Tryon; but I prefer for the 
present to adhere to Férussac’s name. According to Férussac H. 
coactiliata has been found in Nicaragua and in Peru; and its range 
is now extended to Venezuela and Trinidad, it having been found by 
Mr. Tate in the former country and by myself in the latter island *. 
The species, as noticed by Férussac, resembles certain European 
shells, and particularly, I think, Helix ericetorum, It is interesting 
to notice that in the same part of Venezuela where H. coactiliata 
occurs is found also the H. labyrinthica, a species which has been 
found in the Eocene of Europe, but was until lately supposed to be 
confined in the living state to certain parts of North America. I 
need hardly remind zoologists of the very great differences, or rather, 
I should say, the entire distinctness of the Molluscan faunas of North 
and South America. It is true that the fauna of the latter division 
of the continent, taken in a broad sense, runs as far north as Mexico 
* T am informed by Mr. T. Bland that H. coaetiliata has also been found in 
Guatemala, and that Messrs. Crosse and Fischer regard H. cordovana and H. 
suturalis, Pfeiff., as synonyms. 
