Fluviatile Mollusca of Trinidad. 49 
Bulimus multifasciatus, Lam. 
The body of the animal is brown. The five bands of chestnut 
on the shell, which are also represented on the mantle, are occa- 
sionally so much interrupted as to form rows of rather distant 
square spots. The shell is somewhat variable as to size. 
Lingual teeth numerous, similar; median with an apical 
toothlet, and a smaller point on each side of it; laterals in 
diverging rows, each with an oblique, broadly reflexed cutting- 
edge. Mandible semicircular, corrugate. 
I propose to describe, as a variety of this species, a form found 
in the southern parts of the island :— 
Var. imperfectus. Shell subperforate, oblong-conic, thin, fragile, 
subpellucid, shining, striated by fine longitudinal lines of 
growth, and zoned with five chestnut bands, of which the 
fourth is the broadest, and the second the smallest; whorls 
5-6, scarcely convex; peristome simple, acute. Height 
0-6 inch, breadth 0°3 inch; height of aperture 0°25 inch. 
This variety is much like the young of the typical form. Its 
peristome is more complete than in the young shell of the type, 
but never expanded as in the adults. In the southern parts of 
the island, where this variety occurs, I have never met with a 
single example of the type form. The B. rufolineatus of Drouct, 
probably a variety of the B. pecilus of D’Orbigny, somewhat 
resembles this variety ; but that species seems to have only 3—4 
bands of colour, while its whorls are a little more convex and its 
aperture larger. 
Bulimus immaculatus, C. B. Adams. 
B. flavidus, Menke; B. stramineus, Guilding, part. 
This shell is not to be confounded with the true B. stramineus. 
B. immaculatus is similar in shape and size to B. multifasciatus. 
It wants the bands of colour which adorn the latter, and it is 
usually of a white colour, tinged more or less with yellow, espe- 
cially near the aperture. The animal is whitish, more or less 
deeply tinged with yellow. Lingual dentition as in B, multi- 
fasciatus. 
This and the two foregoing and the following species are en- 
tirely arboreal in their habits. 
Bulimus aureolus, 1. sp. 
Shell subperforate, ovate-conic, rather acuminate, thin, yellow, 
shining, translucid, finely striated by minute and close longi- 
tudinal lines of growth, crossed by finer decussating striz ; 
whorls 5, scarcely convex, except the last, which is somewhat 
carinate ; aperture ovate; peristome simple, acute. Height 
0-6 inch, breadth 0°3 inch ; height of aperture 0°32 inch. 
Ann & Mag. N. Hist. Ser. 3. Vol. xvi. ds 
