PLACOSTYLUS, SOLOMON IS. 95 



Var. stramineus Brazier (pi. 38, fig. 55). A pale straw-yellow 

 cuticle retained in adults; shell rather short and less sack-like below, 

 with 5 whorls; peristome very dark red, the columellar fold usually 

 yellow. 



Ugi (Gulf or Golf'e) Island, close to S. Christoval to the north- 

 ward, on the trunks of palms, four or five feet from the ground 

 (Brazier). 



Var. minor Brazier. Shell small, narrow, white; peristome pale 

 orange-yellow. Length 45 mill (Braz.}. 



Ulana (Ulaua or Contrariete) Island, north of S. Christoval, on 

 palm trunks (Brazier). 



Ulana Island is some distance from San Christoval, but closely 

 allied to it faunally, and probably was connected therewith later than 

 with any other islands. The other islets inhabited by varieties of 

 this species are immediate dependents of the larger island. 



Var. albolabris Brazier (pi. 38, fig. 52). White with a very pale 

 yellow cuticle ; peristome opaque white ; form rather short, and base 

 less sack-like than in the type. Length 55 mill. Specimen figured 

 measures length 50, diam. 23, length of aperture 33 mill. 



San Christoval and Santa Anna 1. (or U-ah I., close to the S.-E. 

 end of S. Christoval), on trunks and leaves of trees (Guppy, Brazier). 



According to Brazier, only the var. albolabris is found on Santa 

 Anna, a small island at the south end of San Christoval. It is very 

 common there. 



P. SELLERSI (Cox). PI. 38, figs. 56, 51. 



Shell compressed-umbilicate, fusiform, thin but moderately solid ; 

 white, the lip, apex and sutural border opaque white, the rest of the 

 shell somewhat grayish-white ; surface shining, smooth except for 

 slight growth lines. Spire slender, with slightly concave outlines, 

 the apex obtuse. Whorls 5-J, but slightly convex, the earlier 2-J 

 forming a long punctate nepionic shell ; last whorl rather inflated at 

 the base. 



Aperture ovate, white ; peristome expanded, thickened within ex- 

 cept at the upper third, white. Columella dilated above., with a 

 moderately convex fold ; parietal callus white, toothless. 



Length 44^, diam. 18, longest axis of aperture 23^ mill. 



Length 1.9, breadth 0.66 inch " (Cox). 



Gaudalcanar Island, Solomon Archipelago. 



