86 THE LAND MOLLUSCAN FAUNA OF BRITISH NEW GUINEA, 



37. Geotrochus oxystoma, E. A. Smith, 1883. 



(Plate x., fig. 20, and PL xi., fig. 21.) 



Syn. — goldiei, Brazier. 



Descr n -- Ann. Mag. Nat. Hist. (5), xi. 191 ; P.L.S.N.S.W. 

 (1), ix. 804. 



Type in British Museum. 



Hab. — Not Dentrecasteaux Islands (Golclie fide Smith), but 

 foot of Astrolabe Range (Goldie) and Doura, Galley Reach 

 (Hedley). 



By adopting Geotrochus as a generic title the necessity is 

 obviated of discarding Smith's name, since oxystoma is not pre- 

 occupied in Geotrochus, though, as Brazier points out, it is in 

 Helix. The figures which illustrate, though they hardly adorn, 

 p. 173 of Stone's " Ten Months in New Guinea," are intended, I 

 believe, to represent this species. 



38. G. elisus, n.sp. 

 (Plate xi., figs. 24-25.) 

 Shell umbilicate, thin, discoidal, carinate ; colour pale straw, 

 with two narrow reddish spiral bands, the superior midway 

 between the suture and the periphery, the inferior encircling the 

 base at a third of the distance from the keel to the umbilicus, 

 the carina is sometimes edged above and below by similar bands, 

 peristome white ; whorls 4J, increasing regularly until the final 

 whorl, which in its latter half contracts a little, the earlier whorls 

 slightly convex, the latter flat ; sculpture close, irregular oblique 

 striations above and below, crossed by a few faint impressed lines 

 in the neighbourhood of the keel ; apex obtuse, the embryonic 

 shell apparently constituting the first revolution ; suture impressed 

 above, becoming linear as it proceeds, margined above by the keel 

 of the preceding whorl ; base flattened at the periphery, slightly 

 swollen within ; umbilicus narrow, deep, exhibiting the volutions; 

 aperture almost horizontal, abruptly and deeply descending, 

 peristome thin, widely reflected throughout its circumference, 

 pinched at the junction of the carina, margins closely approaching, 



