52 Mr. R.J.L. Guppy on the Terrestrial and 
columellar tooth is considerably less developed than in P. dis- 
tortus. P. auris-sciuri is thus intermediate between the Vene- 
zuelan species and that of St. Vincent. 
The young shell is thin, and resembles a Succinea-shaped 
Bulimus. The animal has plain head-lobes. Lingual teeth— 
central with a single long acute cusp, base produced on both 
sides; laterals with a rather square point, on each side of 
which is an obsolete toothlet, base produced outwardly. Man- 
dible semicircular, with distant coarse striz. 
This species is arboreal. In Bland’s list it is given as P. 
glaber, from which it is evidently distinct. 
Ennea, H. & A. Adams. 
Ennea bicolor, Hutton. 
This species reminds one somewhat of shells of the genus 
Carychium. It seems to be very rare in Trinidad ; for IL have 
only seen four examples, of which only two were alive. It m- 
habits the crevices of rocks in damp places near streams. 
The tentacles (four) of Enea bicolor are bright pink, the foot 
pale yellow. The lingual membrane is long and narrow ; teeth 
slender, somewhat hooked. The dentition does not resemble 
that of the typical Pupe (e. g. P. chrysalis, P. striatella, &ec.). 
Pupa striatella has teeth resembling those of some of the 
Bulimi. 
Vertico, Miller. 
Vertigo Eyriesi, Drouct. 
Pupa Eyriesii, Drouet, Moll. Guy. Frang. p. 71, pl. 2. f. 16, 17. 
The two examples which have occurred to me in Trinidad are 
somewhat larger than the dimensions given by Drouet. They 
are 0:07 inch high, and 0:035 inch in extreme width. They 
were found on ferns. 
CyLInDRELLA, Pfeiffer. 
Cylindrelia trinitaria, Pfeiffer. 
The animal is ashy-grey, becoming nearly black about the 
head and tentacles. Foot elongate, narrow; tentacles (4) slen- 
der. Lingual ribbon very long and narrow; teeth 3.1.3; 
medians narrow, bicuspid, with two tubercles on the base ; first 
and second laterals with simple round cusps; outer lateral in- 
conspicuous, rather claw-shaped. 
The mollusk is rarely seen in motion, except when it is actually 
raining. The steep and overhanging sides of the small rocks of 
rugged limestone in the woods on the Laventille Hills, near 
Port-of-Spain, are frequently decorated with dozens of these 
little shells attached by their apertures to the rock. 
