162 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



Setae and acicula are pale throughout. Anterior composite hooks have 

 a shaft that is slenderer and longer than that farther back, but in other 

 respects the hooks resemble one another. In transitional parapodia (forty- 

 fourth and vicinity) a composite hook is still fairly long appendaged (pi. 

 fl, fig. 232). Simple hooks in more posterior parapodia have a larger 

 tooth and several smaller ones distally (pi. 11, fig. 233). 



The proboscidial armature is heavy, dark to black except for the calci- 

 fied portions. The mandibles are thick, strong, somewhat calcified dis- 

 tally, nearly 3 times as long as broad, the basal ends are free from one 

 another for a short distance (pi. 11, fig. 230). The maxillary carriers are 

 longer than broad, the basal ends frayed. Forceps (maxillae I) are fal- 

 cate; maxilla II has 4 well-defined teeth on either side, increasing in size 

 distally; maxillae III and VI have each a heavy, thick tooth, but the 

 third maxilla on the left side has a small boss below, faintly resembling 

 a second tooth (pi. 11, fig. 231). 



L. Ibnicola comes near to L. inflata (above) in having composite 

 hooks in anterior segments, elongate postsetal lobes posteriorly, and yel- 

 low acicula, but the maxillae are very different and the body and para- 

 podia far more robust ; also, the prostomium is here short, triangular, in 

 L. inflata it is depressed, subglobular. The specific name refers to its 

 habitat, in mud. 



Holotype. — AHF no. 49. 



Type locality. — Off Point Fermin, California, in 16-18 fms (coll. 

 1202-40). 



Distribution. — Off southern California, in shallow dredgings. 



Lumbrineris index (Moore) 

 Plate 12, Figs. 254-256 



Lumbrinereis japonica index Moore, 1911, pp. 288-289, pi. 19, figs. 119- 

 127; MacGinitie, 1935, p. 692. 



Collections.— nZZAO (1); 1134-40 (1); 1136-40 (11); 1137-40 

 (1); 1142-40 (2); 1156-40 (1); 1163-40 (1); 1223-41 (1). 



The prostomium is short, a little broader than long, squat, bluntly 

 rounded in front. Slender, composite, hooded hooks are present in the 

 first 25 to 33 segments, entirely replaced by simple hooks thereafter. 

 Parapodia are conspicuous throughout because of the length of the post- 

 setal lobe, which is directed laterally. In the first 15 to 18 parapodia the 

 postsetal lobe is broad, but with a dorsal prolongation (pi. 12, fig. 255). 

 These parapodia are supported by 3 black acicula and provided with 5 

 or 6 superior limbate setae, 4 to 6 composite hooks, and one to several 



