16 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
chitinous with the usual large dorsal tooth and small teeth on about 
three-fourths of the circumference (fig. 4a); it thus differs from the 
material of Malmgren (1867) and Imajima (1966). Two rows of soft 
papillae encircle the outside of the pharynx. The proventricle has 50 
to 70 rows of papillae and is followed by a pair of spherical caeca. 
The dorsal cirri, annulated in the anterior region of the body, are 
smooth in the middle and posterior regions. Setae from the middle 
region of the body have short blades (figs. 4b, c). Setae with long, 
straight blades as reported by Berkeley and Berkeley (1945) for 
animals from Vancouver Island are absent in our animals. Swimming 
setae occur from setigers 17 or 18 onward. 
Exogone lourei Berkeley and Berkeley 
Figures 4d-e 
There are several specimens. An inspection of the type (USNM 
32895) showed that the proventricle is rather long, extending from 
the third to the sixth setiger (fourth to seventh in our specimens). 
In a median parapodium of one of our specimens, the tip of the simple 
dorsal seta is slightly serrated (fig. 4d); compound setae with short 
blades have small teeth above the main fangs (fig. 4e). 
Pionosyllis uraga Imajima 
Figures 4f, g 
Pionosyllis uraga Imajima, 1966, p. 114. 
There are many anterior fragments with up to about 30 setigers, 
4 mm long and 0.7-0.8 mm at greatest width (without parapodia). 
Commenting on the description by Imajima (1966), we note that the 
proventricle of our specimens has about 35 rows of papillae and 
extends through 12-14 setigers. The dorsal cirri alternate in length. 
The long ones of the anterior setigers as well as the dorsal tentacular 
cirri are 1.5-2 mm long. Farther posteriorly, the dorsal cirri decrease 
in size and are twice the body width at about the thirtieth setiger 
although there are cirri of 2 mm length even on the twentieth setiger. 
Neuropodial setae are numerous in the anterior 12-15 setigers and 
appear faintly yellow in direct light. Subsequently the number of 
setae is sharply reduced to approximately 20 or less. In this region, 
there are up to four neuropodial aciculae. In one animal there is a 
dorsal acicula but natatory setae are absent (fig. 4f). The uppermost 
setae with very long blades (about 100u, fig. 4g) have faintly serrated 
cutting edges at their bases and bidentate tips. The compound setae 
with blades of ordinary length (25u-40u) have strongly spinose 
cutting edges, except the lowermost ones with the shortest blades. 
The ends of the shafts of these setae are slightly serrated but do not 
