NON-MARINE MOLLUSCS OF SURINAM. 3 
C. van Heurn, to whose infatigable ardour in collecting 
animals our museum is owing already many molluses of 
the Dutch fauna, passed some months in Paramaribo, the 
capital of Surinam, and brought home from there large 
zoological collections, among them many molluses. It was 
this collection that induced me to occupy myself with the 
non-marine molluscs of Surinam, and to look after the 
specimens from that colony, represented in the collection 
of the Leyden Museum. In doing so, I soon was struck 
by the fact that Mr. van Heurn’s collection, obtained chiefly 
in the neighbourhood of Paramaribo, and only during a 
rather short period, chiefly spent in collecting higher 
animals, was containing not only a great deal of the 
species already recorded from Surinam, but also many 
species not yet recorded from there, and moreover some 
species new to science. 
IT am convinced that there will be found a great 
quantity of new species, or, at least, of species recorded 
from neighbouring parts of South-America, when a careful 
collecting of molluses will be undertaken in Surinam, not 
only in the settlements on the coast, but also in the interior 
of the colony. [ hope to be able to raise some interest 
in collecting molluscs, in persons dwelling in the country 
itself, and thus having the best opportunities for it. 
In this paper I am giving a list of the non-marine, 
shell-bearing molluscs, recorded till now from Surinam, to 
which [ have added the species, obtained by the Leyden 
Museum, mostly during the last years. In an other note 
Prof. H. Simroth will treat the slugs received from Surinam. 
I have to thank the following gentlemen for kindly 
comparing specimens or allowing me to examine myself 
specimens from their collections: Mr. H. Fulton, Dr. I’. Haas, 
Dr. F. Jousseaume, Mr. H. B. Preston, Mr. G. C. Robson, 
Mr. M. M. Schepman, Mr. G. B. Sowerby and Prof. J. Thiele. 
The species, represented in the Leyden Museum, are 
marked with an *. To those, of which the alleged occur- 
rence in Surinam is doubtful, is added a ?.- 
Besides the papers, containing the original description 
Notes from the Leyden Museum, Vol. XXXVI. 
