74 
PACIFIC SCIENCE, VoL VI, January, 1952 
located on a prominent cone between the 
palpal bases. Palpi are paired, large, broad, 
deeply grooved, and intermediate in length 
between the larger and the smaller tentacles; 
they are inserted at the ventrolateral margins 
of the prostomium. The tentacles are of 2 
sizes; on each side there are 6 larger dorsal 
ones in a crescentic arrangement and con- 
tinuous with the corresponding ones from 
the opposite side; in addition there are about 
13 smaller ones on a side, arranged within 
this crescent around the buccal region. All of 
the tentacles are long, cylindrical, and taper 
to blunt tips. The mouth is a broad, con- 
spicuous crescent below the prostomial lobe 
and opens into a voluminous, pouch-like 
proboscis. 
The burrow is long, U-shaped, larger at the 
cephalic end, and limited in diameter so that 
the contracted animal is closely surrounded; 
it is found in shale rocks or other penetrable 
materials such as sponge and shell masses. 
DISTRIBUTION 
Stylarioides inflata is common in low inter- 
tidal zones to 39 fathoms, in the warmer 
parts of the northeast Pacific, from Oregon 
south at least to Baja California, Mexico. 
REFERENCES 
Berkeley, E., and C. Berkeley. 1941. On a 
collection of Polychaeta from southern 
California. South. Calif. Acad. Sci. Bui. 
40 (1): 16-60, 18 figs. 
Fraser, C. 1943. General account of the 
scientific work of the Velero 111 in the 
eastern Pacific, 1931-41, Part III. A ten- 
year list of the Velero III collecting stations. 
Hancock Pac. Exped. 1 (3): 259-431, 115 
charts. 
Hartman, O, 1936. Nomenclatorial changes 
involving California polychaete worms. 
IVash. Acad. Sci. Jour. 26: 31-32. 
Treadwell, A. 1914. Polychaetous annelids 
of the Pacific coast in the collection of the 
zoological museum of the University of 
California. Calif Univ. Pubs., Zool. 13: 
175-234, 2 pis. 
