Micronesian Gastropods — Demond 
297 
Lambis chiragra (Linne, 1758). 
Hirase and Taki (1951) pi. 88, fig. 2; Kira 
(1955) pi. 16, fig. 12. 
Characteristically 8 to 10 inches long, with 
a wrinkled, orange-colored aperture and colu- 
mella. 
Lives on seaward reef flats, in sand between 
rocks and coral heads, and in tide pools. Also 
found among masses of coral ( Heliopora ) in 
channels between seaward reefs in 8 to 10 feet 
of water. Invariably found below low tide 
line. 
geographic range: USNM collections 
are from Zanzibar on the east African coast 
eastward throughout the Indian and Pacific 
oceans to the Marshall and Gilbert islands, 
and from southern Japan and the Mariana 
Islands south to northern Australia and New 
Caledonia. A common Lambis in Micronesia, 
but not reported from Hawaii. 
Lambis lambis (Linne, 1758). 
Hirase and Taki (1951) pi. 87, fig. 1; Kira 
(1955) pi. 16, fig. 7. 
Characteristically 6 to 8 inches long with 
slender, upward-curving apertural spines and 
a smooth, pinkish aperture. 
Lives in sand on both seaward and lagoon 
reef flats, and on sandy lagoon floors, ranging 
from a few feet below low tide line to depths 
of 10 feet. 
geographic range: USNM collections 
are from the east African coast eastward 
through the Indian and Pacific oceans to the 
Society and Tuamotu islands, and from south- 
ern Japan, the Mariana and Marshall islands 
south to northern Australia and New Cale- 
donia. The most common Indo-Pacific Lam- 
bis , but not reported from Hawaii. 
Lambis truncata (Humphrey, 1786) (syn. bryo- 
nia Gmelin, 1791). 
Hirase and Taki (1951) pi. 87, fig. 2. 
The largest species of Lambis , characteris- 
tically 10 to 15 inches long. A ponderous 
shell with a smooth, flesh-colored aperture. 
Commonly found at depths of 15 to 30 
feet off the edge of seaward reefs, in sand 
among coral boulders. Also lives on sandy 
lagoon shelves among seaweed or on minor 
reef prominences in 2 to 10 feet of water. 
Invariably occurs below low tide line. At Ono- 
toa Cloud observed a group of individuals 
which appeared to be sedentary. They were 
partly buried in the sandy bottom; their shells 
were overgrown with coral-algal encrustations 
and with colonies of branching coral 5 to 7 
inches high. An examination of their stomach 
contents indicated that they had ingested 
quantities of the sandy substrate, presumably 
for nourishment. 
GEOGRAPHIC RANGE: USNM collections 
are from East Africa eastward throughout the 
Indian and Pacific oceans to the Fiji Islands, 
and from the Ryukyu, Mariana, and Marshall 
islands south to New Caledonia. Reported 
from northern Australia but not from Hawaii. 
Fairly abundant in Micronesia. 
Genus Terebellum Lamarck, 1799 
Terebellum terebellum (Linne, 1758) (syn. sub- 
ulatum Lamarck, 1811). 
Hirase and Taki (1951) pi. 89, fig. 1; Kira 
(1955) pi. 15, fig. 1. 
Characteristically 2 to 3 inches long and 
whitish with light brown markings. 
The recent Micronesian collections include 
several lots of this species dredged from 
depths of 90 to 200 feet on the sandy bottom 
of Bikini lagoon and from 6 feet of water in 
Tomil Harbor, Yap. 
GEOGRAPHIC range: There are no USNM 
records east of Micronesia. USNM collections 
are from Mauritius in the Indian Ocean east- 
ward through the Pacific to Samoa, and from 
southern Japan, the Mariana and Marshall 
islands south to northern Australia and New 
Caledonia. This species is uncommon in Mi- 
cronesia. 
Family NATICIDAE— Moon Shells 
Genus Polinices Montfort, 1810 
