JOHNSON: POLYCHAETA OF PUGET SOUND REGION. 417 
33. Flabelligera infundibularis sp. nov. PI. 12, figs. 124- 
127. 
Form (Fig. 124) rather stout, squarish, dorsal aspect more 
flattened than the ventral; enclosed in clear mucus; tapered in 
posterior third to a minute caudal extremity; oral region (2d 
somite?) flared, with an almost complete circle of setae on the 
margin, formed by two broad fan-shaped fascicles; intersegmental 
constrictions deep; parapodia (Figs. 124, 126) well developed, 
distinctly biramous, on every somite from the third. 
Peristomium within the oral funnel; bears numerous slender 
tentacles and two stout, lobulated palpi (/>.). 
Dorsal setae (Figs. 125, 126) longest and most numerous on 
second somite, where they form the funnel; on the other somites, 
more slender, delicately curved, completely imbedded in the jelly, 
transversely striate. Ventral setae (Fig. 126) begin on third somite, 
one or two in each ventral ramus, in form of long hooks, trans¬ 
versely striate, blackish towards tip. Numerous sensory papillae 
(Fig. 127) are borne at the tips of long varicose pedicels. 
Somites in four specimens are 42, 50, 56, and 71, increasing in 
number with size of animal. In contraction, somites are at least 
four times as broad as long. 
Length of specimen with 56 somites (about average size), 55 
mm.; greatest transverse diameter, 5 mm. 
According to the statements of Harrington and Griffin (’97, p. 
162), this sj)ecies is enormously abundant in Scow Bay, where it 
covers the muddv bottom over an area about half an acre in extent. 
The depth given for one lot of specimens is six fathoms. It does 
not appear in any of the littoral collections from the region of 
Seattle. 
The extraordinary elongation of the dermal sensory papillae in 
species of this genus is well exemplified in the present form. The 
thick coating of mucus which envelops every part of the animal 
except the anterior and posterior extremities (Fig. 124) (the funnel 
formed by the broad flabellate oral tentacles makes a passage to the 
mouth) apparently renders necessary this method of putting the 
animal in communication with the outer world. 
