SHELLS FROM THE MOLUCCAS. 157 
23. Omphalotropis ceramensis Pfr. 
Martens, Ostas. Landschn. p. 160, pl. 4, fig. 11. 
A few specimens, collected by Martin together with the 
preceding species. They are smaller than those described 
by v. Martens, varying from 7 to 9 mill. in length. In 
every other respect they agree with his description and figure. 
24, Helicina oxytropis Gray. 
Martens, Ostas. Landschn. p. 166, pl. 4, fig. 20. 
Many specimens along with the preceding species. They 
are very small, having only a diameter of 7 mill, 
25. Helicina suturalis Martens. 
Martens, Ostas. Landschn. p. 168, pl. 4, fig. 18. 
Along with the preceding species. 
26. Helicina Idae Pfr. 
Martens, Ostas. Landschn. p. 170, pl. 4, fig. 19. 
A few specimens along with the two preceding species. 
The three species of Helicina are new for the Mollusk- 
fauna of Saparoea. 
27. Neritina (Neritaea) pulligera Linn. 
Martens, in Martini-Chemn. 2d Ed. Mon. Neritina, p. 
49, pl. 1, figs. 4, 5. 
One specimen from the northern coast of Ceram, and 
another from Hatoesoea, Ceram; both collected by Prof. 
Martin. 
28. Neritina (Neritaea) iris Mouss. 
Martens, |. c. p. 52, pl. 9, figs. 5, 6. 
A few specimens from Hatoesoea, Ceram, collected by 
Martin; they are nearly all inhabited by hermit-crabs, and 
in consequence the denticles of the columellar margin are 
destroyed. 
Notes from the Leyden Museum, Vol. XV. 
