AET. 15 NEW AUSTRALIAlsr LAND SHELLS MAESHALL 9 



flaring, with the outer lip indistinctly angulated by the angle of the 

 periphery; the whitish line above the nearly black color of the base 

 less distinct but wider. 



The type (Cat. No. 333799, U.S.N'.M.) measures : Greater diameter, 

 48 mm. ; lesser diameter, 44 mm. ; height, 32 mm. It and three para- 

 types (one of them juvenile) come from Yam Island in Torres Strait 

 and were presented by Mr. C Walton. 



The angulated periphery, the less convex base and the smaller, less 

 flaring aperture distinctly difl^erentiate this subspecies from Thers-ltes 

 hartschi hartschi. 



One of the paratypes is juvenile, another varies from the type in 

 form, being depressed and each whorl slightly sunken into the suc- 

 ceeding whorl, due to the fact that the suture does not fall along the 

 periphery but is attached a trifle above it, 



THERSITES (HADRA) BARTSCHI OMA, new subspecies 



Plate 3, fig. 2 



Shell thin, inflated, whorls 61^4, well-exserted, rounded; body whorl 

 rounded, inflated, its upper edge descending near the aperture. Base 

 very convex, umbilicus rather wide, but little concealed by the 

 expanded columellar tip. Sculpture of rather indistinct lines of 

 growth and microscopic reticulations. Sutures well impressed, 

 irregularly crenulated by the upper ends of the growth lines. Color 

 nearly uniformly rich dark chestnut, the color of the base very little 

 darker than the spire except near the aperture where it is several 

 shades darker. In place of the whitish line dividing the colors of 

 the spire and base this shell has a narrow band of chestnut darker 

 than that of either base or spire. Suture obscurely margined below 

 by dark chestnut. Aperture horizontal, widely rounded, peristome 

 thin, reflected, parietal wall glazed. Interior violaceous; by trans- 

 mitted light distinctly divided by a dark line, into two parts, the 

 upper of which is much lighter in color than the lower. 



The type (Cat. No. 333801, U.S.N.M.) measures: Greater diameter, 

 38.5 mm. ; lesser diameter, 30 mm. ; height, 26 mm. It comes from 

 Yam Island, Torres Strait, and was presented by Mr. C Walton. 



THERSITES (HADRA) BARTSCHI NURA, new subspecies 



Plate 3, fig-. 7 



Shell small, about one-half the size of Thersites hartschi l)m'tsc'hi 

 similar to it in other respects but with characters less pronoimced. 

 The band at the periphery is yellowish-wliite, the peristome very 

 little reflected, interior violaceous, the upper part lighter than the 

 lower, a clear-white band between them. 



The type (Cat. No. 333802, U.S.N.M.) measures: Major diameter, 

 31 mm.; minor diameter, 28 mm.; height, 21 mm. It comes from 

 Yam Island, Torres Strait, and was presented by Mr. C. Walton. 



