SHELLS FROM THE MOLUCCAS. 155 
The only specimen, collected by Martin in the same 
locality as the preceding species, resembles in shape fig. 
17 of Brot, but differs by the ribs, which cover the whole 
shell, though on the last whorl they become obsolete. 
16. Paludina costata Quoy & Gaim. 
Quoy & Gaim., Voy. de l'Astrolabe, pl. 80, figs. 1—3. 
A few specimens, varying much in the number of spiral 
keels, were collected by Martin in the lake of Tondano , 
Celebes. The largest specimen has a length of 45 mill. 
17. Stenothyra ventricosa Quoy & Gaim. 
Mousson, Land u. Süssw. Moll. von Java, p. 63, pl. 
8, fig. 6. 
One specimen without operculum, together with the 
preceding species. 
18. Leptopoma vitreum Lesson. 
Martens, Ostas. Landschn. p. 143 pro parte. 
Large numbers of specimens have been collected by Martin 
at Wahaai, North Ceram; near Honitetoe, West Ceram; 
also a small variety at Kajeli, Boeroe; at last a few broken 
specimens from Saparoea may belong to this species. 
Those from Wahaai are generally large, a few specimens 
have brown zigzag lines, one specimen has moreover two 
distinct brown bands, which are obsolete in another spe- 
cimen with broad flames, while a third has only 2 bands; 
many specimens have slight crenulations on the backside 
of the peristome, recalling in mind L. crenilabre Boettg., 
which has, however, a much broader peristome, with more 
and deeper crenulations, and the auricle near the columella 
is different; a few specimens from Wahaai in another box 
and probably from a somewhat different locality , are smaller 
and white, with the exception of one young specimen , 
which is banded. 
The specimens from West Ceram vary in the same manner 
Notes from the Leyden Museum, Vol. XV. 
