318 
PACIFIC SCIENCE, VoL XI, July, 1957 
Fig. 26. Columbella turturina Lamarck. Onotoa Atoll, 
Gilbert Islands (USNM 607538). 
Family BUCCINIDAE— Buccinid Snails 
Genus Cantharus Roding, 1798 
Subgenus Pollia Sowerby, 1834 
Cantharus ( Pollia ) fumosus (Dillwyn, 1817). 
Characteristically 0.75 to 1.5 inches long. 
Closely resembles C. undosus with its raised 
brown spiral cords, white aperture with orange 
lips, and hairy periostracum. However, C. 
fumosus is more elongate and, unlike C. un- 
dosus , possesses axial ribs. 
The recent Micronesian collections include 
only one lot of four specimens taken among 
intertidal rocks of Tomil Harbor beach, Yap 
Island. 
Fig. 27. Cantharus ( Pollia ) fumosus (Dillwyn). Cebu, 
Philippines (USNM 419449). 
geographic range: Apparently more 
widespread than C. undosus , particularly in the 
Indian Ocean where C. undosus is reported 
only from Cocos-Keeling Atoll. USNM rec- 
ords are from Mauritius, the Red Sea, and the 
coast of India, eastward through the Indian 
and Pacific oceans to the Society and Tua- 
motu islands; and from southern Japan south 
to New Guinea and Fiji. Uncommon in Mi- 
cronesia. Not reported from Hawaii. 
Cantharus {Pollia) undosus (Linne, 1758). 
Fig. 28. Cantharus ( Pollia ) undosus (Linne). Luzon, 
Philippines (USNM 303327). 
Characteristically about one and one-half 
inches long with numerous, dark brown, 
evenly spaced, raised spiral cords on all whorls 
and typically covered with a hairy periostra- 
cum. Aperture white with dark orange lips. 
Resembles C. fumosus but may be distinguished 
from that species by its broader shell and its 
complete lack of axial ribs. 
C. undosus ordinarily lives in rock crevices 
on seaward reef flats, near or a few* feet below 
low tide line. It also occurs in reef flat tide 
pools above low tide line and on small lagoon 
reefs at depths of a few feet. 
geographic range: USNM collections are 
from Cocos-Keeling Atoll in the Indian 
Ocean eastward through the Pacific to the 
Society and Tuamotu islands, and from the 
Marianas south to New Guinea and the 
