JOHNSON: POLYCHAETA OF PUGET SOUND REGION. 425 
setae begin at third somite and cease at sixteenth. Uncini begin 
at sixth somite (the third setigerous somite), and extend to the 
pygidium. Dorsal rami of all abdominal parapodia destitute of 
setae and uncini. 
Prostomium (Figs. 158, 162, 163) broadly truncated with two 
antero-lateral lobes; no eyes; a pair of transverse slits containing 
the nuchal organs at its base. 
Peristomium (Figs. 158, 162, I) forming, with second somite, a 
region destitute of parapodia and branchiae. The club-shaped 
tentacles, about fifteen in number, arise from the inner border of the 
peristomium ; they are destitute of papillae, but in contracted state 
are wrinkled (Fig. 163). 
Branchiae , four on each side, smooth, terete, subulate, arise from 
dorsal aspect of the third, fourth, and fifth somites; in length about 
twice the diameter of the body (Figs. 158, 162). 
Ventral rami or tori (Fig. 157) spatulate, increasing from the 
fourth somite to the sixteenth, thence diminishing to end of body. 
Each bears a single row of pectinate, six-toothed uncini (Fig. 161). 
Dorsal thoracic rami contain fascicles of single and double- 
bordered, straight and slightly-curved setae (Figs. 159, 160); 
dorsal rami achaetous throughout the abdomen. 
Length of largest specimen, 27 mm.; greatest transverse diameter 
of same, 5 mm. 
Several specimens are in the Columbia University collection, 
without data as to depth and locality. No tubes were preserved. 
This species comes close to Sabellides ( Amage ) auricula (Malm- 
gren) but differs from it in having longer branchiae, attached to 
three somites, shorter tentacles, and differently shaped uncini. 
Sabellides auricula , however, has been reported from Japan by 
Marenzeller (’85), and its occurrence in any part of the North 
Pacific would therefore not be surprising. 
I follow Theel (’79) in discarding Malmgren’s genus Amage , as 
not being sufficiently distinct from Sabellides. 
Terebellidae. 
43. Amphitrite robusta sp. nov. PI. 16, figs. 164-168. 
Form short, robust, thickest anteriorly in region between 5th and 
12th somites, gradually and almost uniformly tapering thence to 
