JOHNSON: POLYCHAETA OF PUGET SOUND REGION. 419 
Tori much enlarged in somites 12-21. Last 3 somites (including 
pygidium) achaetous; pygidium funnel-shaped with cirrose border. 
Perianal cirri (Fig. 130) 18-30 in number, alternately long and 
short; the mid-ventral one much elongated, and containing prolonga¬ 
tion of the ventral nerve-cord ; tips of all the longer cirri recurved. 
Anal rosette with alternate sectors raised, corresponding in position 
with the longer cirri. 
Capillary setae of two forms, bordered and serrated, the latter 
much the more slender (Fig. 133). Both kinds in same fascicle; 
begin at second somite. Uncini (Figs. 131, 132) with five or six teeth, 
including rostrum, graduated in size ; bristles at base of rostrum lat¬ 
eral in position. 
Length of large specimen, 162 mm.; greatest transverse diam¬ 
eter, 3.5 mm. 
This fine species comes near Axiothea catenata Malmgren, a form 
of wide distribution in the North Atlantic and Arctic, and reported 
from Bering Sea by Marenzeller (’90). The present species, how¬ 
ever, differs from it in the form of the serrated setae and of the 
uncini. In A. catenata there are four preanal achaetous somites, 
in the present species only two ; C. rubrocincta has 22 segments ; 
A. catenata , 24. 
The present species was collected both by the Columbia Univer¬ 
sity Expedition and by Miss Bobertson. I have found it in 
abundance at the entrance of Tomales Bay, and at San Pedro, 
California. It forms a tube of coarse sand, which is lined bv a 
peculiarly tough, opaque, whitish membrane. 
36. Nicomache personata sp. nov. PI. 13, figs. 134-139. 
Size small; 25 somites, of which all except the peristomium and 
the last two are setigerous ; no cephalic plate; prostomium and 
peristomium united to form a hood-shaped head (Fig. 134); 
mouth large, overhung by projecting upper lip; a distinct crease in 
peristomium back of mouth. 
Somites increasing in length back of second ; longest from the 8th 
to the 17th; those at the end very short; pygidium (Fig. 135) 
funnel-shaped, with a zone of 16-18 cirri on margin, quite uniform 
in length. Dorsal and lateral surfaces of head and first four or five 
somites beautifully mottled with chocolate-brown; ground-color, 
white; somites 2-5 with contrasting white and brown bands ; on the 
head these bands have the aspect of a grotesque face. 
Setae of five kinds: (1) capillary double-bordered setae in all 
