Nonmarine Mollusks of Rongelap — Rexgle 
127 
FIG. 1. Map of Rongelap Atoll, showing collecting localities and principal islands (after Taylor, 1950). 
Insert shows position of Rongelap Atoll in the Marshall Islands. 
two-thirds were found alive. This collection was 
presented to Dr. Henry van der Schalie, who 
was working on Eniwetok at that time. The 
Rongelap collection was later given to the 
author for study. In addition one lot of shells 
containing two species was collected by Dr. 
van der Schalie on the island of Japtan, Eni- 
wetok Atoll. Four lots of Marshall Island non- 
marine snails were contained in the University 
of Michigan Museum of Zoology collection. 
One of these is a new locality record. 
The material examined has been deposited in 
the University of Michigan Museum of Zoology, 
and representative Truncatellidae were placed 
with the Museum of Comparative Zoology, 
Harvard University. 
Acknowledgments'. I wish to thank Dr. Henry 
van der Schalie for helpful suggestions and the 
use of facilities; Dr. William J. Clench for 
kindly determining Truncatella granum; Mrs. 
Annie Gismann for reviewing the manuscript; 
and Lee Lonsdale for preparing the illustration. 
SYSTEMATIC LIST 
The nonmarine snail fauna collected by Dr. 
Wallen on Rongelap Atoll comprised the fol- 
lowing species: 
Family Ellobiidae 
Melampus luteus Quoy and Gaimard 
Marshall Islands records: none. 
Distribution on Rongelap: Mellu; only 2 
living specimens. 
Melampus fasciatus Deshay es 
Marshall Island records: none. 
Distribution on Rongelap: Mellu; 18 living 
specimens. 
