88 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.10 



yellow, geniculate, pointed acicula, A fifth parapodium has 4 tridentate 

 hooks, as in the third, also a bidentate seta without hood (pi. 5, fig. 104) 

 that may not be typical, 5 or 6 slender, pointed setae, and 3 yellow 

 acicula. 



The tube is thin, limp, and closely adheres to the body of the in- 

 habitant; it consists of a parchmentlike base with fine sand grains at- 

 tached to the outside. In another collection (1133-40) the tube is thickly 

 covered with fine-grained dark mud over a layer of fine sand grains, and 

 in collection 876-38 the tube is covered with a layer of coarser sand 

 grains. 



N. iridescens, N. elegans (below), and A/", holobranchiata (Maren- 

 zeller, 1879, p. 132) from Japan are obviously closely related to one 

 another. All have branchiae already present from the first setiger, simple 

 throughout. Chamberlin (1919, p. 295) separated them for the presence 

 or absence of eyespots and comparative length of the distal hook in an- 

 terior parapodia. Monro (1930, p. 132) concluded that N. iridescens 

 and N. elegans are perhaps identical, and perhaps also N. pallida Moore 

 (1911, p. 256). However, I believe the differences separating N. iri- 

 descens and N. elegans are sufficiently great to merit specific recognition. 

 N. iridescens lacks heavy acicular hooks, ventral cirri are cirriform 

 through 6 or 7 segments, subacicular hooks are first present from the 

 thirteenth to fifteenth setiger, and the intersegmental groove is darker 

 than the segment. N. elegans has heavy acicular hooks, ventral cirri are 

 cirriform through only 4 or 5 setigers, subacicular hooks are first pres- 

 ent from the tenth setiger, and the intersegmental groove is pale in con- 

 trast to the darker segmental band. Both species lack composite spinigers. 



Distribution. — Originally dredged off Victoria, British Columbia, 

 these records extend through California and western Mexico, in 8- 

 290 fms. 



Nothria elegans (Johnson) 

 Plate 5, Figs. 113-117 



Northia elegans Johnson, 1901, pp. 406-407, pi. 8, figs. 77-85. 



Collection.— ^^1-3^ (8). 



The first 3 anterior segments are each marked, dorsally, with a broad, 

 reddish-brown stripe; the intersegmental grooves are pale. Ceratophores 

 are long and distinctly articulate. The inner paired ones are the longest. 

 The outer paired ceratophore has 9 shorter articles and a longer distal 

 one, its style is shorter than the total length of its ceratophore. The inner 

 lateral ones have a ceratophore nearly twice as long, with 10 shorter 

 articles and a longer distal one; the style extends back to about the 



