Freshwater-Shells of the Loutsiade Archipelago. 205 
21. Pupinella Macgregort. (Pl. XIII. figs. 1, 2.) 
Testa P. grandi magnitudine, colore, forma et sculptura fere similis ; 
labrum pallidum: vel flavescens, superne anguste persectum, 
incisura extus supra regionem umbilici tubulum J formante. 
Longit. 29, diam. 15 millim., apertura intus 7 longa et lata. 
Hab. Rossel Island. 
This species is in general character also like P. grandis. 
It has, however, a somewhat shorter and broader aspect and 
is perhaps a little more strongly pitted upon the back of the 
body-whorl; it is, however, at once distinguished by the 
peculiarity of the labial slit, which is formed into a distinct 
tube over the umbilical region. In P. grandis and P. lowisia- 
densis the slit is transverse to the lip; in the present species 
it is almost perpendicular to the axis of the shell and higher 
up than in the other species referred to. 
22. Pupinella rosseliana, (Pl. XIII. figs. 5, 6, 6 a.) 
Testa P. grandi paulo minor, brevior, colore et sculptura subsimilis ; 
incisura labri fere obsoleta; labrum minus incrassatum, antice 
prominens. 
Longit. 25, diam, 133 millim., apertura 7 longa et lata. 
The smaller size and the almost obsolete notch in the 
labrum readily separate this species from the rest. These 
characters are quite constant in the sixty specimens examined. 
The young shell, consisting of five whorls, is opeuly and 
perspectively umbilicated and has no ridge around the umbili- 
cus, as in the adult form. 
I have examined the opercula of P. grandis, P. rosseliana, 
and P. Macgregor, and observe that they all present trifling 
differences. 
23. Pupinella minor, (Pl. XIII. figs. 7, 8.) 
Testa pupiformis, sublevis, sordide albida (vel pallide rubida ?) ; 
anfract. 6, regulariter crescentes, ultimus oblique descendens, 
supra apertura subplanatus ; perist. incrassatum, reflexum, mar- 
gine columellari angustissime persecto, incisufa supra umbilici 
regionem tubulum irregularem formante. 
Longit. 19, diam. 9 millim., apertura intus 5 millim. longa et lata. 
Hab. Rossel Island. 
‘This is a smaller species than P. 4ngas?, with a labial slit 
somewhat resembling that of P. Mazaregort. ‘The single 
specimen at hand is in worn condition, so it is impossible 
