128 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



The proboscis (seen by dissection) has 14 longitudinal rows of sub- 

 terminal papillae with 15 to 20 in a row; the largest are distal and 

 they diminish in size proximally to very minute ones. There is none 

 in middorsal or midventral positions. The proximal surface is smooth. 



Interramal cirri are involute and first present from the fourth seg- 

 ment; they are small at first but come to inscribe a complete spiral 

 within a few segments; they are present on all segments to near the 

 end of the body. The first segment is similar to that shown for the stem 

 species ( Michaelsen, 1897, pi. 1); ventral cirri are large triangular 

 and project forward; the first notopodium is present as a low mound 

 with a very small notopodial lobe. Preacicular setae in both rami surpass 

 and outnumber postacicular ones. Farther back the ventral cirrus is 

 much smaller and other parapodial parts are more developed. 



In typical parapodia the notopodium consists of a broad upper post- 

 setal lobe and a much smaller, inconspicuous lower portion that is 

 surpassed by the conical acicular lobe. Its presetal part is short and 

 notched, with the superior part the larger. Neuropodia have a broad, 

 foliaceous postsetal lobe that extends out slightly beyond the conical 

 acicular lobe ; the preacicular part is weakly notched. A slight prolonga- 

 tion or spur of the superior edge of the neuropodium corresponds to 

 the erect superior lobe of the stem species. Ventral cirri are large and 

 triangular. Preacicular setae are barred ; postacicular setae are long, 

 tapering, finely denticulate at the cutting edge. Furcate setae are absent. 

 Acicula are yellow, deeply embedded except for the recurved tip. 



A. rubella anops differs from the stem species, A. rubella (Michael- 

 sen) most conspicuously in its much smaller size, 55 mm as against 

 60-120 mm long; the prostomium lacks eyespots instead of having them; 

 interramal cirri are present from the fourth, instead of third segment; 

 the proboscis has only 15-20 papillae in subterminal rows instead of 

 30-40 papillae. 



The specimen selected as holotype was reported as Nephthys rubella 

 Michaelsen by Berkeley (1945, p. 327) collected from Mittelnacht 

 Island, east end of Vancouver Island; it is a gift from Drs. E. and 

 C. Berkeley to whom thanks are here extended. The paratype was 

 dredged, with Goniada annulata Moore, by the U.S.S. Albatross on 

 August 29, 1905, station 4748. 



Holotype and paratype in the Allan Hancock Foundation. 



Type locality. — Mittelnacht Island, east end of Vancouver Island, 

 Canada. 



Distribution. — Vancouver Island and between Departure Bay and 

 Clarke Rock, western Canada in 20 fms (Berkeley, 1924) ; also Yes 



