COMPLETE HARTMAN: POLYCHAETES FROM CALIFORNIA 97 



equal to that of the first 18 segments. The first segment is biramous, 

 with the notopodium smaller than the neuropodium ; the former is 

 represented by a digitate cirrus and an inconspicuous setal fascicle; 

 the neuropodium has a broad postsetal lobe and a spreading setal 

 fascicle. Parapodia from the second segment are about twice as large 

 as those from the first and resemble those of more posterior segments. 



Branchiae are present from the eighth setigerous segment (PL 14, 

 fig. 1 ) , at first small and globular ; they increase in length and attain full 

 size within 6 or 7 segments, where they are long, straplike and con- 

 tinued posteriorly through a long region; they are lacking from about 

 the last 30 segments. The posterior end of the body terminates in a 

 collarlike, glistening white lobe with a dorsal notch. 



Notopodial setae are of two kinds and all are distally pointed. An 

 anterior vertical series consists of shorter, broadly limbate setae and a 

 posterior vertical series of longer, slenderer ones. These differences are 

 most notable in segments immediately following the modified fifth seg- 

 ment, in which the shorter broader setae are also more inferior (PL 14, 

 fig. 4) than the longer, slender ones. 



The modified fifth segment is about twice as long as those adjacent 

 to it. It has a dorsal setal fascicle with 6 to 8 distally pointed, geniculate 

 setae, and an inferior fascicle of 8 to 10 pointed setae, somewhat larger 

 and less bent than those of the upper bundle. The thick, modified spines 

 are nearer the dorsal fascicle; they are of a single kind, number about 

 6 on a side, are yellow, falcate in shape and accompanied by an equal 

 number of slender, lanceolate setae. 



Hooded hooks are present from the seventh setigerous segment ; at 

 first they are few in a series and number about 4 in a fascicle, accom- 

 panied by 2 to 5 inferior pointed setae (PL 14, fig. 1). After the 

 twelfth neuropodium the uncinial series is followed by a ventralmost 

 pointed seta, and by the fifteenth the ^pointed setae are absent. Seen 

 individually, the hooded hook is distally bifid, with the teeth oblique 

 to the shaft; those in anterior (PL 14, fig. 3) and posterior (PL 14, 

 fig. 2) segments differ little except in decreasing size farther back. 



Some individuals are encased in a mucoid tube externally coated with 

 flocculent mud ; the tube is nearly straight and friable. 



Polydora neocardalia resembles P. cardalia Berkeley (1927, p. 418) 

 from western Canada. Both have a prostomium incised in front; a 

 long nuchal ridge extends through the pre-modified segments; and the 

 fifth segment has similar superior and inferior fascicles of setae. P. 



