Micronesian Gastropods — Demond 
277 
one connected with the Micronesian field 
studies, especially to the principal collectors 
named in Table 1. Without them the paper 
could not have been written at all, since it is 
mainly a compilation and condensation of 
their field notes. 
Dr. Preston E. Cloud, Jr., Chief, Paleon- 
tology and Stratigraphy Branch, U. S. Geo- 
logical Survey, outlined, supervised, and 
inspired the project. Without his unfailing 
support it never would have materialized. 
For his encouragement, his advice on sys- 
tematics, and for providing office space and 
access to the National collections, I wish to 
thank Dr. Harald A. Rehder, curator of the 
Division of Mollusks, U. S. National Mu- 
seum. 
To Mr. Frederick M. Bayer, U. S. National 
Museum, I am grateful for his patient de- 
scriptions of collecting localities and his many 
kind suggestions. 
Dr. R. Tucker Abbott, now at the Phila- 
delphia Academy of Natural Sciences, of- 
fered much helpful direction and assistance 
until and after his departure from the Na- 
tional Museum. 
Dr. J. P. E. Morrison, also of the U. S. 
National Museum, supplied ecologic infor- 
mation and advice. 
Miss Carolyn Bartlett, U. S. Geological 
Survey, prepared the beautiful pen and ink 
drawings that comprise Figures 1-42 of this 
report, taking special pains to render the color 
patterns in monochrome. Mrs. Elinor Strom- 
berg, U. S. Geological Survey, drew the Indo- 
Pacific map. 
Dr. Robert G. Schmidt, U. S. Geological 
Survey, gave tireless editorial assistance and 
encouragement. 
The work was financially supported by two 
research grants from the Developmental, En- 
vironmental, and Systematic Biology Division 
of the National Science Foundation, adminis- 
tered by the U. S. Geological Survey, Paleon- 
tology and Stratigraphy Branch, and by the 
Pacific Science Board of the National Research 
Council. 
GENERAL CONCLUSIONS AND SUGGESTIONS 
FOR FUTURE WORK 
This report reveals how little is known of 
the habits of these mollusks. We can hardly 
begin to understand them without much more 
extensive field and laboratory studies on such 
problems as optimum environmental require- 
ments, nutrition, feeding methods, reproduc- 
tion, egg laying, larval development, growth 
rates, and anatomy. However, any collector, 
by keeping accurate detailed notes, can help 
to answer many questions. The following 
outline of suitable observations, which could 
be expanded almost endlessly, is suggested: 
Condition of specimen 
Alive 
Recently dead 
Beachworn 
Habitat 
Oceanward 
Seaward reef flat 
Seaward reef edge 
Surge channel 
Offshore ocean water (depth) 
Other 
Lagoonward 
Lagoon reef flat 
Lagoon shelf (depth) 
Lagoon slope (depth) 
Lagoon floor (depth) 
Lagoon reef patch 
Other 
Substrate 
Inorganic 
Sand 
Mud 
Rocks 
Other 
Organic (living or dead?) 
Coral (species?— collect for identifica- 
tion) 
Soft coral (species? — collect for identifi- 
cation) 
Seaweed (species?— collect for identifica- 
tion) 
Mollusks (species?— collection for iden- 
tification) 
