JOHNSON: POLYCHAETA OF PUGET SOUND REGION. 423 
Cirri, especially those of the first cirriferous somite (“tentacular 
filaments ”) of great length, frequently forming a tangled mass 
nearly as long as the entire body. Anus in pygidium, minute. 
Length of large specimen, 100 mm.; greatest transverse diam¬ 
eter, 5 mm. 
There are several specimens in the Columbia University collec¬ 
tion, obtained “between tides.” I have not found this species on 
the California coast. 
40. Cirratulus robustus sp. nov. PI. 14, figs. 149, 150. 
Form short and thick; ventral aspect broadly flattened, concave 
anteriorly and posteriorly; dorsum rounded, tapered about equally 
towards both ends; 112 somites in one specimen, not divided into 
rings (Fig. 150). 
Prostomium (Fig- 149) shorter and thicker than in preceding 
species ; eye-spots in two oblique rows. First three somites achae- 
tous, fully twice the length of the rest; fourth with two clusters of 
tentacular filaments and with dorsal and ventral setae (Fig. 149, t. /.). 
Parapodia (Figs. 149, 150) slightly developed ; anteriorly with 
capillary setae alone; at the 19th or 20th somite the ventral uncini 
begin, and two or three somites further back, the dorsal; cirri 
inserted low in anterior somites (Fig. 149), gradually rising to mid¬ 
lateral line (Fig. 150) towards middle of length, then in posterior 
region gradually approaching the dorsal setae. Anus terminal. 
Length , 59 mm.; greatest transverse diameter, 5 mm. 
Only two mature and one young specimen of this species are 
available for description. One adult specimen was obtained at 
Neali Bay by the Columbia University Expedition; the other at 
Port Orchard by Miss Robertson. Both lack the cirri. The setae 
and uncini of this species are practically identical with those of 
Cirratulus cingulatus. 
Ampiiictenid ae . 
41. Fectinaria brevicoma sp. nov. PI. 15, figs. 151-156. 
Form conical, gradually widening towards anterior end ; cephalic 
disc nearly fiat, plane, its edge entire; scapha broadly ovate, not 
wider transversely than posterior end of thorax. Total number of 
somites, about 27 ; 21 in thorax (of which 17 are setigerous, and 13 
are uneinigerous), and 6 (?) in scapha. 
