GASTROCOPTA, AUSTRALIA. 165 



about 41/2 rather strongly convex whorls. Surface little shin- 

 ing, faintly striate and most minutely granulose, as usual. 

 The aperture is rounded-quadrate, with essentially the tooth 

 arrangement of G. macdonnelli, from which this form differs 

 by the very much larger size of the columellar lamella, the 

 greater part of which is turned downward along the columel- 

 lar axis, therefore appearing very large in a front view. 

 Typically both infraparietal nodule and basal fold are present 

 (figs. 7, 10), but in some specimens the infraparietal is wajit- 

 ing, and the basal reduced (fig. 8). 



Length 2, diam. 1 mm. (fig. 10; type). 



Length 2.1, diam. 1 mm. (fig. 9). 



New Guinea: Mita, Milne Bay (Charles Heclley). 



Pupa pedicula ShuttL, HEDLEY, Proc. Linn. Soc. N. S. 

 Wales, (2), vi, 1891, p. 99 (exclusive of references). 



The form of the columellar lamella separates this species 

 from G. pediculus, and allies it to G. moellendorffiana and 

 various Asiatic species as far north as Japan. 



In one specimen the space between the angular and the for- 

 ward continuation of the parietal lamella is filled with callous 

 deposit, so that the tooth does not appear forked in front. 

 This variation is occasionally seen also in G. pediculus. 



100. GASTROCOPTA TATEI n. sp. PI. 26, figs. 9, 10 : pi. 30, fig. 

 12. 



The shell is dextral, cylindric, grayish or bluish white, 

 smooth, rimate. Whorls convex. Angular lamella running 

 from near the insertion of outer lip, converging towards the 

 parietal, with which it is joined by a lower callous. Parietal 

 lamella stronger, slightly curved in a basal view, the con- 

 cavity towards the columella. Infraparietal lamella is tuber- 

 cular, slightly lengthened. The columellar lamella is situated 

 high on the columella, is stout and subhorizontal, curving 

 downward a little towards the inner end. The basal fold is 

 well developed, and situated on the basal part of the columel- 

 lar margin, being subcolumellar in position. Lower palatal 

 plica is long and enters more deeply than the upper. Upper 

 palatal plica is placed somewhat obliquely, converging in- 



