356 
Dì. L. SOÓS 
two last with sculpture of fine and close spirals, the 3—5 whorls with 
extremity fine and irregular growth-wrinkles ; aperture little oblique, 
ovate, whitish within, peristome expanded, thin, white 
margins connected by a very thin callus. 
Diam. 10*5 mm., length 21*5 mm., apert. 10 mm. 
Bismarck Archipelago : Gerard de Nys I d (Gerrit 
Denys). 2 specimens. 
It is closely allied to P. carter ensis Quoi et 
Gaimard, but differs by its less slender form. If the 
specimens mentioned by Pilsbry (Manual of Conch. (2) 
XX, p. 299) which originate from the original habitat of, 
P. carter ensis (Port Carteret, New Ireland), are actually identical with 
Quoi and Gaimard’s species, then P. gerardensis should be regarded 
with the greatest probability as identical with P. carter ensis, since 
Pilsbry’ s specimens — as is to be seen from his description — differ 
from the mines only that the former are smaller (17‘5 : 8*5) and that 
their sculpture is somewhat different. 
50. Opeas gracile (Hutton). 
Bulimus gracilis Hutton, Journ. Asiat. Soc. Bengal, III, 1834, p. 84, 93; 
Stenogyra gracilis Tapparone Canefri, 1. c. p. 88 ; Opeas gracile Pilsbry, 1. c. (2) 
XVIII, p. 125, tab. 18, fig. 3—6. 
German New Guinea: Firedrich-Willielmshafen, Simbang, Erima, 
Jómba, Hanseman Mts., Belias I d . 
Fig. 10. 
Partula 
gerardensis. 
51. Succinea simplex Pfr. 
Succinea simplex Pfeiffer, Proc. Zool. Soc. London, 1854, p. 123; Mon. Hel. 
viv., IV, p. 813 ; Hedley, 1. c. p. 100, tab. 12, fig. 32. 
German New Guinea. 
