222 
PACIFIC SCIENCE, Vol. XX, April 1966 
FIGS. 14-16. Omphalotropis. 14, Omphalotropis submaritima — ( granum ) , cotype, from Guam (Univer- 
sity of Michigan Museum Zoology No. 77604). 15, Omphalotropis fragilis. 16, Omphalotropis fragilis, oper- 
culum. 
alone or In combination with the spiral bands. 
Shells of maximum size have 6 V 4 suture 
whorls and measure 6.0 mm high, and 3-3 mm 
greater diameter. The operculum (Fig. 16) is 
corneous, light brown, and paucispiral. 
Possibly the Omphalotropis zebriolata Mous- 
son cited by Hedley (1899-417) from Funafuti 
and many other Pacific islands is identical or 
closely related, but I have had no access to ma- 
terial which would settle this problem. 
Omphalotropis suturalis Quadras and Mollen- 
dorff 
Omphalotropis suturalis Quadras and Mollen- 
dorff 1894, Nachr. d.d. Malak. Ges. 26: 22. Not 
figured. Type locality: Mariana Islands. 
The few specimens were all sent to Dr. Cooke, 
who noted that he could not separate the Ulithi 
specimens from those of Guam. 
REFERENCES 
Abbott, R. T. 1949- New syncerid mollusks 
from the Mariana Islands. B. P. Bishop Mus. 
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1958. The gastropod genus Assiminea 
in the Philippines. Proc. Acad. Nat. Sci. Phi- 
ladelphia 110:213-278. 
Baker, H. B. 1925. North American Veroni- 
cellidae. Proc. Acad. Nat. Sci. Philadelphia 
77:157-184. 
1941. Zonitid snails from Pacific is- 
lands, Parts 3 and 4. B. P. Bishop Mus. Bull. 
166: 201-370, pis. 43-65. 
Bates, M. 1956. Man as an agent in the spread 
of organisms. In: Man’s Role in Changing the 
Face of the Earth, N. L. Thomas, ed., Univ. of 
Chicago Press, Chicago. Pp. 788-806. 
Christian, F. W. 1899- The Caroline Islands. 
Meuthen and Co., London. 412 pp. 
