242 PROCEEDINGS OP THE SCIENTIFIC ASSOCIATION. 
Helix ierensis n. sp. 
A horny brown trochiform very obliquely costulate deeply 
umbilicate Helix with a convex spire the apex of which is 
smooth ; the suture is deeply sunk ; whorls 5, a little cari- 
nate ; peristome simple, columella a little reflected. Height 
2 mill., breadth 3 mill. 
This species, which I found at Maracas, is nearly allied 
to the preceding, differing from it in being more depressed 
and in its open umbilicus. Its aperture is also rather lu- 
nate than circular. It may be compared with the H. och- 
thephila of D’Orbigny (Yoy. Amer. Merid., pi. 28, f. 9-12). 
The derivation of the specific name is from lere, the Indian, 
name of Trinidad. 
Helix bactricola Guppy. 
Ann. Sf Mag. N. H, 4 ser., vol. i., p. 440. 
A small pyramidal deeply umbilicate fuscous horny Helix 
with 7 narrow slowly increasing closely costellate whorls 
carinate on the periphery, a conic spire, a smooth apex, and 
an angularly suboval aperture with a simple peristoma. 
Height 2^- mill., breadth 4. Found on palms on the Cer- 
ros of Aripo. 
Bttlimueijs Leach 1814. 
(See “Proceedings,” anted , p. 17). 
JBulimulus tenuissimus Per. 
A species resembling B. fraterculus (see “Proceedings,” 
p. 18) but of stouter figure. It is found with that species. 
Pupa Draparnaud 1805. 
Terrestrial Inoperculata with stout cylindrical shells, hav- 
ing an obtuse apex and slowly increasing whorls, and a semi- 
