164 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 22 



more distant. The white cylindrical tubes are apt to be attached to the 

 translucent shell of a pelecypod, Cyclopecten zephyrus Grau. The known 

 distribution is limited to southern California. 



Genus VERMILIOPSIS Saint- Joseph, 1894 



Vermiliopsis biformis, new species 



(Plate 18, figs. 1-3, plate 19) 

 Numerous individuals have been taken, including some in Santa Cata- 

 lina Basin (Sta. 2130), attached to the dead shells of Lacqueus (brachio- 

 pod) (Plate 18). The tube is characteristic in that the basal part is 

 longitudinally ridged, with a high, dorsal keel, and the distal part is 

 abruptly cylindrical, erect (Plate 18, fig. 1), resembling that of a 

 Serpida. The animal within is a typical Vermiliopsis in that the oper- 

 culum is inflated in its distal end (Plate 18, fig. 2) ; the stalk is smooth 

 (Plate 18, fig. 3) or somewhat annulated. The species is more completely 

 dealt with in another paper in preparation. 



General Considerations and Conclusions 



The deep water polychaetes of southern California cannot be studied 

 without consideration of the reports based on the collections of the 

 U.S.S. Albatross from the eastern Pacific Ocean in 1904, largely 

 published by Moore (1909, 1911, 1923). It is rewarding to find that 

 the species named in these reports have been nearly all re-discovered 

 through the operations of the Velero IV. Some strictly abyssal forms 

 (preceded by "A" in the list below) may occur only occasionally in the 

 outer series of basins (see another report in this volume), whereas most 

 of the other species may be eurybathic, some occurring over a wide 

 range of depths and usually more closely associated with kinds of sedi- 

 ments (ranging frcm muds to rocks) than with depths of bottom. 



Moore (1909 to 1923) recorded a total of 177 species based on the 

 Albatross collections, of which many were new at the time. Eighty-nine 

 came from deep water (usually more than 300 fms) of which 10 may 

 be regarded as abyssal, chiefly from depths greater than 1000 fms. Many 

 of the others have been found at shallower depths and in other areas. 



These deep water and abyssal species are as follows: 



