76 THE LAND MOLLUSC AN FAUNA OP BRITISH NEW GUINEA, 

 14. M. CALCARATA, n.sp. 



(Plate ix., fig. 8, and PI. x., fig. 9.) 



Shell small, subdiscoidal, perforate, thin, translucent ; colour 

 dark chestnut, apical whorls straw-coloured ; whorls 4 J, rounded, 

 slowly increasing ; sculpture, to the unassisted eye the surface is 

 smooth and glossy, but the microscope shows extremely fine 

 radiating waved hair lines ; spire scarcely elevated, embryonic 

 whorls 2, distinct ; suture channelled, margined beneath by a 

 heavy opaque callus ; base flattened, umbilicus narrow triangular, 

 circum-umbilical region funnel-shaped ; aperture not descending, 

 vertical, ovate lunate, peristome straight, thin, columellar margin 

 thickened and produced into a callous spur overhanging the 

 umbilicus, callus on body whorl thin and microscopically granulated. 

 Diana, maj. 2-J-, min. 1^, alt. 1 mm. 



Type in Queensland Museum. 



Hah. — Associated with C. starkei and P. pedicula under 

 sticks and stones, near the beach, 200 yards west of Mita village, 

 Milne Bay (Hedley). 



I have here accepted the value given to the badly defined section 

 of Microcystina by Tryon (Man. Conch. (2), n. 124.) These 

 Papuan species are probably allied to the Fijian forms there 



enumerated. 



15. Helicarion visi, n.sp. 



(Plate x., fig. 13.) 



Shell depressed, thin, brittle, glossy, transparent ; colour pale 

 yellow ; whorls 3J, rather rapidly increasing, rounded at the 

 periphery ; sculpture fine incremental striae ; suture margined, 

 impressed, base imperforate, impressed in the centre, swollen 

 around it ; aperture diagonal, ovate lunate, peristome thin, simple, 

 margins joined by a slight callus, columellar margin reflected. 

 Diam. maj. 8, min. 7, alt. 4 mm. 



Type in Queensland Museum. 



Hab. — Basilaki Island; six examples under sticks and stones 

 in the jungle (Hedley). 



