244 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



In the individuals of these species that have been examined, the jaws 

 and accessory pieces do not differ sufficiently among themselves to render 

 them useful in comparison. The aileron is a slender bar, somewhat broad- 

 er where it is attached to the jaw, and the latter is a strongly falcate, 

 clawlike structure. 



Distribution. — Chile; Peru; New Zealand (Augener). Intertidal, to 

 8 fms. 



Hemipodus borealis Johnson 

 Plate 43, Fig. 121 

 Hemipodia borealis Johnson, 1901, pp. 411-412, pi. 10, fig. 104; Moore, 

 1909, pp. 259-260; Treadwell, 1914, p. 198; Berkeley, 1927, p. 

 411. 



Collections. — 910-39, Mission Bay. 3 specimens. 



The parapodia have an elongate, triangular presetal lobe, and a short- 

 er, bluntly rounded, postsetal lobe, somewhat as in H. simplex, but less 

 truncate. The proboscis is clavate when everted. The papillae of the pro- 

 boscis are closely crowded, elongate, conical (pi. 43, fig. 121), approxi- 

 mately circular in cross section. They differ, therefore, from those de- 

 scribed for H. roseus Quatrefages, in which they are small, foliaceous 

 (Arwidsson, 1899, p. 29). 



Distribution. — Northeast Pacific, from British Columbia south to 

 San Diego, California. Intertidal. 



Genus GLYGERA Savigny 

 Key TO Species 



1. Branchiae present, retractile; parapodia with 2 presetal and 2 



postsetal lobes 2 



1. Branchiae present, not retractile; parapodial lobes as above 4 



1. Branchiae absent; parapodia with 2 presetal and 1 or 2 postsetal 

 lobes 5 



2. Branchial lobe simple, digitate; neuropodial postsetal lobe 

 shorter than notopodial postsetal lobe . . . G. rouxii, p. 245 



2. Branchial lobe much branched ; the 2 postsetal lobes of approxi- 

 mately the same length 3 



3. Parapodia much deeper than long ; postsetal lobes deep but not- 

 ably shorter than the presetal lobe . . G. longissima, p. 245 



3. Parapodia as long as, or longer than, deep; postsetal lobes re- 

 semble presetal lobes G. americana, p. 246 



