On the Identity of Stylarioides inflata (Treadwell) 
and Its Extended Distribution (Annelida)^ 
Olga Hartman ^ 
The identity of a common intertidal mem- 
ber of the family Flabelligeridae (polychae- 
tous annelid) forms the basis of this report. 
The species is redescribed after a study of 
holotype specimens and other individuals 
from both adjacent and more distant regions. 
The characters of the prostomial and peri- 
stomial parts and the structure of transitional 
setae are detailed. 
The materials were collected from widely 
scattered parts of the northeastern Pacific by 
numerous individuals. Holotypes and other 
specimens are deposited in the Allan Hancock 
Foundation of the University of Southern 
California. Illustrations were prepared by 
Anker Petersen, staff artist of the Allan Han- 
cock Foundation. 
Family FLABELLIGERIDAE St. Joseph, 1894 
Genus Stylarioides delle Chiaje, 1841 
Stylarioides inflata (Treadwell) 
Figs, la-c, 2a- f 
Trophonia inflata Treadwell, 1914: 213-214, 
pi. 12, fig. 33. 
Trophonia minuta Treadwell, 1914: 213, pi. 
12, fig. 32. 
Stylarioides dimissus Hartman, 1936: 21. 
Stylarioides inflata Berkeley, 1941: 46, 
^Contribution No. 73 of the Allan Hancock Foun- 
dation of the University of Southern California, Los 
Angeles, California. 
^Allan Hancock Foundation, University of Southern 
California. Manuscript received August 11, 1950. 
MATERIALS EXAMINED 
Holotype specimens of Trophonia inflata 
from Santa Catalina Island and others so re- 
ported (Treadwell, 1914) from Portuguese 
Bend and San Diego, California, in depths to 
21-28 fm.; holotype specimen of Trophonia 
minuta from off La Jolla in 10 fm. Other col- 
lections come from Caspar, Mendocino 
County, shore; Moss Beach, San Mateo 
County, shore; off central California in 18-42 
fm.; and along shaley coves of southern Cali- 
fornia, shore. The following station numbers 
of the Velero III (see Fraser, 1943, for data) 
are represented: 1191 (1), 1207 (1), 1210 (1), 
1232 (5), 1260 (3), 1284 (2), 1417 (2), 
1437 (2), 1456 (3), and 1468 (2), from shore 
to 39 fm., and including geographic areas 
from Oregon to Baja California, Mexico. 
The type collections of Trophonia minuta 
and T. inflata have been compared and are 
considered to represent a single species. As 
minuta is preoccupied, the correct specific 
name is inflata, as used recently (1941) by 
Berkeley. Stylarioides dimissus Hartman, 1936, 
proposed to replace the preoccupied name, 
minuta Treadwell, 1914, is thus also synony- 
mous. 
The type specimen of Trophonia inflata 
from Santa Catalina Island has been dried at 
some time but the characteristic features of 
cephalic plaque and uncini are still visible. 
The specimen labeled T. minuta comes from 
a calcareous tube in sponge. Its anterior dor- 
sal end is enlarged and obliquely truncate 
(Fig. \a), covered with a thin layer of fine 
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