1886.] NATURAL SCIENCES OF PHILADELPHIA. 31 



P. perlucens, nobis. PLate 11, fig. 2. 



Shell dextral, oblong, ovate, very thin and pellucid ; whorls 5, 

 well rounded, bod^' -whorl somewhat inflated, spire more tlian half 

 the length. Suture well impressed, spiral striiE numerous and 

 fine, umbilicus compressed, nperture ol)l ([Ue, round oval, lip 

 white, concave and moderately reflected. Color a very pale 

 green. Length 18 mill., diameter 9 mill.; length of aperture 

 9 mill., diameter 4 mill. 



Hab. Uji or Golfe Island^ Solomon Islands (Arboreal). 



Obs. Compared with P. similaris, herein described, it is a 

 larger, thinner and more inflated shell. Capt. Brazier sent me 

 two examjDles, the smaller measured : length 14 mill., diameter 8 

 mill. 



P. incurvum, nobis. Plate II, fig. 3. 



Shell dextral, ovate, elongate, thin and translucent, spire 

 slender, elongate, more than half the length; whorls 5, rounded, 

 suture impressed, spiral striae numerous, subperforate, with the 

 umbilicus slightly compressed, columella slightly nodose. Aper- 

 ture ovate, very oblique, lip white, moderately reflected and 

 concave. Color yellowish white. Length 18 mill., diameter, 

 8 mill. ; length of aperture t mill., diameter 4 mill. Arboreal. 



Hab. Rubiana Island, Solomon Islands (Capt. Brazier). 



Obs. This is a distinct species, with a very oblique aperture, 

 giving the shell a bent appearance at the middle. 



P. regularis, nobis. Plate II, fig. 4. 



Shell dextral, ovate elongate, thin and translucent; spire half 

 the length; whorls 5, rounded, suture impressed, spiral striae 

 numerous, waved and very fine, umbilicus compressed, aperture 

 direct, lip white, concave and slightly expanded, margins of the 

 peritreme connected by a very thin callus. Color yellowish 

 white. Length 1*7 mill., diameter 8 mill.; length of aperture 

 8"5 mill., diameter 5 mill. Arboreal. 



Hab. Savu, Galeria Island, Solomon Islands (Capt. Brazier). 



P. minor, nobis. Plate II, fig. 5. 



Shell ovate, somewhat oblong, tliin and feebly translucent, 

 spire as long as the aperture ; whorls 5, slightly rounded, suture 

 impressed, oblique striae coarse, spiral striae obsolete, umbilicus 

 compressed, lip white, flat and moderately reflected, aperture 

 direct, margins of the peritreme connected by a stout callus. 



