ENDEMISM IN THE NORTH PACIFIC 51 



The thorax consists of 17 setigerous segments. The proboscis-like 

 organ is prolonged, conical, and distinctly papillated (Berkeley and 

 Berkeley, 1952, fig. 150), Notopodial setal fascicles are present from 

 the third branchial segment; uncini are present from the second setiger- 

 ous segment. Abdominal parapodia have a large, subcircular lobe at the 

 upper edge of uncinal ridges (as shown by Berkeley and Berkeley, 1952, 

 fig. 151), Branchiae number three pairs; they form palmate tufts, with 

 up to 30 filaments in a tuft. Peristomial eyespots are absent. 



Distribution: The present records extend the distribution from the 

 Chukchi Sea, northwest of Alaska, to the Gulf of Lower California, 

 western Mexico, in 20 to 315 fms. 



SERPULIDAE 



Pro/ij Ehlers, 1887 



This is a small genus of nonoperculated serpulids, related to Protula 

 Risso and distinguished from it chiefly by its much smaller size and the 

 structure of its collar setae. In Protula, the setae are simple, tapered 

 blades; in Protis some have a subdistal finlike expansion and a deep 

 notch that separates the fin from the tapering end. Tubes are white, 

 approximately cylindrical except where attached to a substratum. In size 

 the animal has a known range from 8.5 mm long by 1 mm wide, to 41 mm 

 long by 1 mm wide. 



The tj^pe of the genus, P. simplex Ehlers, is known through one 

 individual taken of? Florida, in 860 fms (Blake Expedition) ; P. tor- 

 quata Hoagland, 1919, comes from intertidal rocky crevices in Puerto 

 Rico. The third species was described from two individuals taken off 

 Santa Rosa Island, California, in 243-265 fms (U.S.S. Albatross Expedi- 

 tion). It is here more extensively recorded from southern California. 



Protis pacifica Moore, 1923 

 Plate 4 



Protis pacifica Moore, 1923, pp. 253-254. 



Collections: Station 1613-48, Oct. 2, 1948, Z?>° 29' 03''; 118° 19' 

 17". In 400-430 fms. 5.5 mi off Long Point, Santa Catalina Island, 

 California, attached to living valves of Cyclopecten sp. ; many others 

 come from the deepest parts of San Pedro Basin, California, reported 

 as serpulid (Hartman, 1955, p. 147) from an impoverished area. 



