238 PROCEEDINGS OE THE SCIENTIFIC ASSOCIATION. 
the descriptions of one new species of Glondina , two of 
Helix , and one of a new genus discovered by me at Mayaro. 
The total number of species of land and freshwater shells 
known to exist in Trinidad is now raised to fifty-two. 
Subkingdom MOLLUSKA. 
Class GASTEROPODA. 
Subclass Inoperctjlata — Pulmonata. 
Order Geophila. 
Spiraxis Adams 1850. 
Terrestrial Xnoperculata with thin cylindrical or ovate- 
oblong shells having a narrow aperture with a sinuate outer 
margin and a twisted columella. 
Spiraxis simplex Guppy. 
Ann. & Mag. Nat. Hist., 4 ser., vol. i., p. 438. 
A turreted species, longitudinally sinuate -plicate, white 
under a light straw-colored epidermis, and having 8 or 9 
whorls. Length 12-15 mill., diameter 4-6 mill. 
A shell which, though rather larger than Stenogyra octona , 
recalls that species in some respects, but examination rea- 
dily shows that it is different. Like most of the shells 
enumerated in the present paper, Spiraxis simplex appears 
to be rare, and has only occurred to me at Maracas and in 
one or two other localities among the northern hills. 
Glandina Schumacher 1817. 
Terrestrial Xnoperculata with oblong-fusiform somewhat 
horny shells having 5-8 whorls, the last narrowed towards 
the base, and a rather narrowed oval-oblong aperture with 
a simple or slightly sinuate peristome and an arcuate co- 
lumella more or less truncate. 
