842 NEW SPECIES OF LAND AND FRESH WATER MOLLUSCA, 



impressed having a narrow white line ; below the suture blotches 

 of purplish chesnut ; base convex having four spiral purplish 

 lines slightly broken up into blotches ; aperture very oblique, large, 

 ovate, interior pui-plish-brown ; peristome thickened, white, 

 reflected ; margins approximating, the right rather thin at the 

 upper part ; columellar margin thickened, broadly expanded and 

 reflected covering half of the umbilicus. 



Diam. Maj. 39. Min. 30. Alt. 24 millira. 



Hah — Maclay-Coast, New Guinea, 1876. 



Only one specimen of this species was found. It has a thick 

 solid white reflected lip 5 mm. broad, and the interior of an intense 

 purplish chestnut. It also resembles, in its marking, Helix 

 Brazierce, Braz from Yule Island, and Helix Taumantias, Tapparone 

 Canefri from the Fly and Katow Rivers, New Guinea. 



3. Helix (Rhysota) Achilles. Nov. sp. 



Shell umbilicated, subdiscoid, granulose, obliquely striated, 

 rather obtusely angled, depressed at the upper part, very light 

 brown, slightly keeled at the periphery ; whorls 5^ moderately 

 convex, first 3 J finely granulated, the last two riigosely granulated, 

 regularly increasing in size, the last very large ; suture impressed 

 deeper towards the last whorl, marked with a narrow broad 

 chesnut line fading away as the apex is reached ; base chestnut 

 brown from the periphery, spirally granulose, the grains getting 

 finer towards the umbilicus ; umbilicus large deep ; aperture 

 angularly lunar, white within, peristome white, margins distant, the 

 right rather thin, columellar margin regular, thickened and joined 

 to the upper with a thick coating of callous on the body whorl. 



Diam., Maj. 50. Min. 43. Alt. 26 millim 



Hah.- — Maclay Coast, New Guinea, 1876. 



One specimen was found. This form is quite peculiar to New 

 Guinea. The whole surface of the shell is granulated in a regular 

 criss-cross way. 



