COMPLETE HARTMAN: POLYCHAETES FROM CALIFORNIA 115 



Setae are entirely simple and of two kinds. Notopodial setae are 

 capillary (PI. 21, fig. 2), occur in fascicles of 15 to 20, and extend 

 laterally far beyond the ventral setae. Neuropodial setae are entirely 

 simple and falcigerous (PI. 21, fig. 2) ; they number about as many as 

 the corresponding dorsal setae or somewhat fewer. They terminate 

 distally in a recurved smooth fang and have delicate serrations along the 

 cutting edge. 



Raricirrus maculata is an unusually small species and may well be 

 overlooked in large collections of many kinds of polychaetes. It was 

 first recognized as a distinct species in a sample from the San Pedro 

 shelf, where it was associated with a richly diversified polychaeta fauna, 

 in a grab sample measuring 51.5 liters of sediments; this sample lacked 

 echinoderms, had few if any ostracods, and mollusks were represented 

 only by a few individuals of Lima sp. The largest animals were a red 

 nemertean, Cerebratulus sp., a seawhip, Stylatula sp. and Panthalis pa- 

 cified Treadvvell. Other polychaetes numbered 64 species and nearly 

 2000 specimens. Most abundant species were Tharyx multifilis Moore, 

 Spiophanes missionensis Hartman, Alediomastus calif orniensis Hartman, 

 Paraonis gracilis Tauber, Onuphis parva Moore, Cossura Candida Hart- 

 man, and some other spionids. 



Family FLABELLIGERIDAE 



The body is long, tapers posteriorly, and the anterior end usually has 

 a cephalic cage directed forward and concealing the prostomium. The 

 surface epithelium is either enclosed in a translucent, nearly glass-clear 

 mucus, or closely papillated with papillae of one to several kinds ; they 

 may be so thickly coated with sand or mud as to completely conceal the 

 body within. Parapodia are biramous with the setal fascicles widely 

 separated but with notopodial and neuropodial lobes inconspicuous or 

 hardly visible, to large and conspicuous (PL 23, fig. 4). Most setae are 

 transversely barred internally. Notopodial setae are simple, slender, 

 distally pointed and more numerous than those in the ventral ramus. 

 Neuropodial setae are thicker, shorter, number only one or few in a 

 fascicle ; they are distally entire or bifid, and simple or composite. 



The prostomium is a small, conical lobe seldom seen except by dis- 

 section. Two pairs of large, lenticulated eyes occupy most of the prosto- 

 mial surface, which is surmounted by a large, semicircular membrane to 

 which the oral tentacles are attached. In Piromis this membrane is 

 medially prolonged as a tongue, and in Coppingeria it occurs as a pair 



