GtJPPT — MOLLUSC A OF TRFNTDAD. 19 
length found amongst decaying wood and loaves. The pe- 
ristome is simple and straight. 
Beyond the island this species is found in Porto Pico and 
the Antilles south of it, and it also occurs in Guiana. 
Height 15 mill., diameter 6 mill. 
Plekocheilus Guilding 1828, 
Terrestrial Inoperculata with ovate-fusiform solid shells, 
an expanded and thickened peristome and a callous colu- 
mella with stout plaits or teeth. 
PlelcocJicilus auris-sciuri Guppy. 
Plekocheilus auris-sciuri, Guppy, Ann . Hag. Nat. Hist. 
3 ser. vol. xvii, p. 51. 
An oblong-conic solid slioll usually spotted or striped 
with reddish-brown or chostnut and having an aperture 
somewhat constricted by the thickened and toothed colu- 
mella and peristome. 
This species is very near to P. glaber, the name undor 
which it is given in Bland’s list. That species seems to bo 
very variable, and although tho examples with which I 
originally compared my shell diffored very considerably 
from the Trinidad form, I have since soon other specimens 
from Brazil which approach our species so closely that there 
might be soino difficulty in separating them. I therefore 
leave it an opon question whoihor these are to be consider- 
ed species or only varieties. The Trinidad sholl varies 
little as to size or form ; its coloring being the least con- 
stant point. It is found on trees in many parts of tho 
island. 
Hoight 37 mill., diameter 16 mill. 
Tornatellina Beck' 1837. 
Torrostrial Inoperculata with ovate-oblong thin hyaline 
shells, an aperture with parietal plaits or teeth, a simple 
peristome and a truncate columella. 
