308 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



lum. Abdominal notopodia have a very long, cirriform postsetal lobe 

 exceeding in length the notopodial base. Setae include a slender fascicle 

 of three to five pointed setae, one or two furcate setae in which the 

 two tines are unequally long and the shaft smooth, and two or more 

 delicate, yellow completely embedded acicula. 



The ventral side of the body is smooth. There is no color except for 

 the dark to black spots on the middorsum, and the dusky appearance of 

 the prostomium and first few segments. 



Distribution. — Califia calida is a deep-water species known only from 

 the deeper parts of San Pedro area, California, associated with siliceous 

 sponge. It is reported as orbiniid, new genus and species (Hartman, 

 1955, p. 179). 



APISTOBRANCHIDAE Mesnil and Caullery, 1898 



As Apistobranchiens Mesnil and Caullery, 1898, p. 147. 



This small family, known for only three species in as many genera, 

 is nearly allied to the Orbiniidae (above) and Paraonidae (below) and 

 is considered transitional between them. It is distinguished for having 

 parapodia with reduced notopodia (weakly biramous) or entirely uni- 

 ramous. Only one species, Ethocles typicus Webster and Benedict, 1887, 

 is known from the Western Hemisphere. The most recent study (Wes- 

 enberg-Lund, 1951, pp. 59-65) enumerates the characters and recognizes 

 the genera named in the key below. The family was first distinguished 

 from the Orbiniidae (as Ariciens) by Mesnil and Caullery (1898, pp. 

 147-149). 



Key to Genera 

 1. Segments 5 to 12 with postsetal neuropodial lobes cirriform in 

 shape Apistobranchus 



1. Segments 5 to 12 with fringed postsetal lobes .... 2 



2. Segments 7 to 1 1 with fringed neuropodial postsetal lobes ; first 

 segment without a ventral lobe .... Skardaria 



2. Segments 8 to 12 with fringed neuropodial postsetal lobes; first 

 segment with a ventral lobe Ethocles 



A list of the genera and species with known localities follows. 

 Apistobranchus Levinsen, 1883, p. 114, with one species, A. tullbergi 

 (Theel), 1879, pp. 45-48, first described from Nouvelle Zembla, 

 European Arctic Ocean, and from western Europe in muddy 

 bottoms (Eliason, 1916, pp. 6-9, figs. 1, 2 and Eliason, 1920, 

 p. 39-40). 



