238 AMPHIBULIMA. 



greatest width of shell below the middle of its length; extremely thin 

 and somewhat flexible ; corneous, clouded with opaque yellow, and 

 sparsely dotted with russet. Whorls 2J, the suture of the firsj; but 

 little descending, but on the latter half of the last it falls steeply. 

 Last whorl convex below the suture, then rather compressed laterally, 

 with faint sculpture of slight, irregular growth-lines and numerous 

 coarse, very low spiral cords. Aperture very large, acutely angular 

 posteriorly, at least four-fifths the total length of the shell, ovate ; 

 outer Up regularly arcuate, a little retracted toward the upper inser- 

 tion. 



Alt. 1"), diam. 9.5, length of aperture 13, width 7.3 mill. 



Alt. 13.5, diam. 8, length of aperture 10.5, width 7 mill. 



Island of Dominica, living buried in thick moss on trees in the 

 higher region of the forest, where the vegetation is always dripping 

 with moisture (Guppy). 



Amphibulima pardalina GUPPY, Ann. & Mag. Nat. Hist. (4), i, 

 1868, p. 432. Succinea pardalina PFR., Monogr. vii, p. 34. 



Amphibulima tigriiia Les., E. A. SMITH, Ann. and Mag. N. H. 

 (6), ii, 1888, p. 231.^-ANGAS, P. Z. S., 1883, p. 595. 



A pardalina is considered by many authors a synonym of A. 

 tigrina. The latter species, if distinct from pardalina, is not known 

 to modern collectors and authors; but I do not unite the two because 

 A. tigrina is described as having but Ij whorls, and no spiral sculp- 

 ture is mentioned, while A. pardalina has at least 2J whorls, and 

 coarse though very low spirals. 



Guppy 's original description of pardalina is as follows : Shell long- 

 oval, Succiuea-\\ke, thin, flexible, diaphanous*, lightly decussated, 

 marked with tawny ; whorls 3 ; spire small, obtuse ; aperture ample, 

 dilated in front ; peristome simple, inflexed above ; suture descending. 

 Length 20, width 11, height of spire 3, width of aperture 9 mill. 



The specimen figured was collected by Dr. B. Sharp. Fig. 23 is 

 enlarged to the same scale as fig. 31, and drawn by camera lucida. 

 The nepionic shell is smooth in the specimens I have seen. 



A. BROWNI Pilsbry, n. sp. PI. Gl, figs. 28, 29, 30, 31. 



Shell oblong, thin, but not elastic or fragile, corneous-olivaceous, 

 with numerous irregularly scattered reddish dots. Surface somewhat 

 wrinkled with growth-stria? and showing numerous very low but coarse 

 irregular spirals. Whorls 2^, the apex decidedly raised ; the suture 



