70 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



from the notopodium at the aciculum, and projects laterally in long 

 streaming filaments, far beyond the parapodia. They recall the spin- 

 ning glands of some of the Polyodontidae, and perhaps function in a 

 similar manner. 



The original description was based on an incomplete male speci- 

 men, taken with "yellow Doris," and was therefore thought to be 

 commensal (Moore, 1910, p. 395). The collections at hand, however, 

 include some in tubes, much like those constructed by Panthalis pacifica 

 Treadwell. An individual 26 mm long occupied a tube 65 mm long, by 

 4-8 mm wide, the walls soft, thick, felted, the lining smooth though 

 not firm, the outer layers containing sand particles. 



Distribution. — California; Anacapa Island and Santa Barbara Is- 

 land, California ; Catalina Island ; Tangola-Tangola, Mexico ; La Plata 

 Island, Ecuador. Moore's unique type came from an unknown locality. 

 Treadwell reported it from San Pedro, California, in 19-38 fms. The 

 available collections extend the known range far to the south (Ecuador). 

 Subintertidal to 40 fms. 



Genus LEANIRA Kinberg 



Prostomium resembles that in Sthenelais (see above), with a stout 

 median antenna inserted on a basal ceratophore with flaring ctenidia. 

 Elytra more or less completely covering the dorsum, with or without 

 marginal fringe. Notopodial setae slender, serrulate, distally pointed. 

 Some neuropodial setae are composite, the appendage tapering to a fine, 

 entire point, with or without transverse canaliculations. Differs from 

 Sthenelais Kinberg in having pointed composite setae instead of bifid 

 setae. 



Leanira fimbriarum, new species 

 Plate 18, Figs. 217-225 



Collections.— 2\6-ZA, 436-35, 640-37, 667-37 (Holotype), 880-38. 

 About 11 specimens. 



Length of 33 anterior segments (667-37) is 24 mm; another larger 

 individual, from 880-38, is 30 mm for 42 segments. General appearance 

 pale, smooth ; the elytra leave uncovered a narrow stripe from about the 

 seventh to twentieth segment, and most of the parapodia. 



