NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 153 



greater distance. A posterior end (coll. 1063-40) terminates in 4 short, 

 anal cirri, each about twice as long as wide at the base. 



A specimen (coll. 10-33) from the Galapagos Islands differs from the 

 others in the collection in that there are no hooks for 34 segments (in- 

 stead of 42-46) and the segments are crossed dorsally by a broader, trans- 

 verse stripe. However, the postsetal lobes and the prostomial parts have 

 about the same shape and proportions, and the maxillary formula is the 

 same. I have found no limbate setae in posterior segments. This individ- 

 ual is questionably referred to L. simplex because of the earlier appear- 

 ance of hooded hooks and the absence of posterior limbate setae. 



Holotype. — AHF no. 47. 



Type locality. — Puerto Refugio Bay, Angel de la Guardia Island, 

 Lower California (coll. 1053-40). 



Distribution. — Gulf of California, in intertidal zones; questionably 

 James Island, Galapagos. 



Lumbrineris bifilaris (Ehlers) 

 Plate 9, Figs. 196-206 



Lumbriconereis bifilaris Ehlers, 1901, pp. 139-141, pi. 18, figs. 1-10. 



Collections.— A91 -35 (1) ; 915-39 (1) ; 1130-40 (7) ; 1131-40 (3) 

 1133-40 (1); 1137-40 (1); 1142-40 (1); 1195-40 (1); 1200-40 (1) 

 1229-41 (1); 1254-41 (1); 1264-41 (1); 1275-41 (2); 1276-41 (1) 

 1299-41 (1); 1314-41 (1); 1316-41 (3); 1321-41 (8); 3915 Burch, 

 off Redondo Beach, California, in 30-75 fms (1). 



After much hesitation and rechecking the specimens listed above, I 

 have referred these collections to L. bifilaris Ehlers, originally described 

 from Chile, even though they differ from the original in several interest- 

 ing and perhaps important details. These individuals may be character- 

 ized as follows. The body is robust, usually pale, with an acutely pointed, 

 short, prostomial lobe (pi. 9, fig. 205). Simple, hooded hooks are pres- 

 ent from the first, or not until the fourth to twelfth, parapodia. Acicula 

 are yellow. Anterior parapodia have a broadly rounded postsetal lobe and 

 a small, papillar superior process (pi. 9, fig. 201) which gives rise, 

 farther back, to the presetal lobe. In median and posterior segments pre- 

 setal and postsetal lobes come to be long, acutely pointed, distinctly bi- 

 labiate (pi. 9, figs. 204, 199). 



Anterior hooks are simple, at first with a long, slender, hooded region 

 (pi. 9, fig. 203) with many fine teeth at the distal end (pi. 9, fig. 202) ; 

 between segments 15 and 25 they are progressively thicker, with a shorter 

 hood, the distal hook provided with 4 larger and several fine teeth (pi. 



