178 LAND- AND FRESHWATER MOLLUSCS 
48 species from that small island. There is no reason to 
expect that the other islands, some of them moreover being 
larger than St. Martin, should be in a much worse condition 
for molluscan life than this island. It is only the want of 
carefully exploring the islands, that accounts for the small 
number of molluses recorded Bon them. 
It is much to be regretted that the Leyden Museum 
possesses only 9 species of the land- and freshwater-molluses 
of the Dutch West-Indian islands, 7 of them from Curacao 
(4 however new for that island, so far as I know), 1 from 
Bonaire, and 1 from St. Martin. 
In order to get a survey of the terrestrial and fluviatile 
molluses, at present recorded from the Dutch islands in 
West-India, I have compiled the following lists, giving for 
each island the molluscs hitherto known. Well stated 
localities on the islands, at which the various species have 
been collected, are wanting in most cases. St. Martin only 
is making a favorable exception in this respect. 
I have added a list of the papers, in which I found 
mentioned the molluses, as inhabiting the different islands. 
Many references in this Bibliography are second-hand, owing 
to the fact that the library of the Leyden Museum pos- 
sesses only very few periodicals and papers dealing with 
Malacology ; moreover many important malacological period- 
icals are not present in any public library in the Netherlands. 
This fact will account for its probable incompleteness, and 
will also, I hope, excuse the errors it might contain. 
Lately Mr. M. M. Schepman wrote to me, that he had 
composed, already in the year 1911, a list of the Mollusca 
of the Dutch West-Indies for an Encyclopedia of Dutch 
West-India, but that, owing to some contributors not sending 
in their manuscripts, his paper has not yet been published 
at this moment. I am sorry not to have been able to consult 
this paper, that, no doubt, will contain valuable matter as 
regards our knowledge of this subject. 
In the following lists, the species represented in the 
Leyden Museum by specimens from the Dutch West-Indian 
islands, are marked with an asterisk. 
Notes from the Leyden Museum, Vol. XXXVI. 
