NO. 2 HARTMAN, BARNARD: BENTHIC FAUNA OF DEEP BASINS 119 



end of the second setigerous segment ; there is no occipital antenna ( Plate 

 10, fig. 1). Eyes are absent or obscure as a pair of spots located at the 

 sides, between the palpal bases. Notopodial postsetal lobes are very con- 

 spicuous from the first segment as large, broadly foliose lobes behind the 

 setal fascicle; they are similar through 14 segments but those of the first 

 6 segments are largest, distally acuminate and they decrease in size poster- 

 iorly. These lobes have a broad base continued across the middorsum as 

 a dorsal fimbriated organ. 



The first 9 segments have only slender, distally pointed setae in both 

 notopodia and neuropodia; the fascicles are full and tufted. A thick, 

 slightly curved genital spine is present in inferiormost position of the 

 series from neuropodium 10, and one or two such spines occur in all seg- 

 ments farther back. Hooded hooks are first present at segment 20-22, 

 accompanied by longer, distally pointed setae and a ventralmost genital 

 spine. They number 6 to 8 in a transverse series; distally they have a 

 large fang surmounted by a tuft of slender spines in spreading series 

 (Plate 10, fig. 2). 



Spiophanes pallidus differs from other species of the genus in having 

 a T-shaped prostomium without lateral horns or antenna ; eyes are nearly 

 or altogether absent. The anteriormost postsetal lobes of notopodia are 

 foliaceous and continued across the middorsum as transverse fimbriated 

 organs. 



The species has been recovered only in East Cortes, San Clemente and 

 questionably San Nicolas Basins; it is thus considered a basin form. 



Spiophanes spp. 



Specimens perhaps attributable to one or the other of the species 

 named above come from other outer basins; they are too fragmentary to 

 assign specifically. Additional collections are needed to characterize them. 



Genus POLYDORA Bosc, 1802 

 Polydora spp. 



Small, juvenile, immature or vegetative (non-reproductive) indi- 

 viduals come from several stations in San Pedro Basin; they may repre- 

 sent species more typically occurring in shallower bottoms of the shelf or 

 slope. Species of this genus are usually shelf forms. 



