156 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



is thus attained far back in the posterior fourth of the body. Setae and 

 acicula are pale or yellow. From about the fiftieth segment the limbate 

 setae are entirely lacking; only one to 3 simple hooks are present. 



The proboscidial armature is characteristic. Mandibles are very thin, 

 pale, translucent; they have a broad, flaring, cutting edge and long, 

 slender, free ends (pi. 14, fig. 313). Maxillary carriers are longer than 

 broad, proportionately massive, slightly incised laterally (pi. 14, fig. 

 314). Maxillae I (forceps) are falcate; maxillae II have 4 teeth on 

 either side, the distalmost tooth the largest, decreasing in size basally; 

 maxillae III and IV have each a single tooth, but IV is a broad, flat 

 plate. In one specimen (coll. 903-39) the maxillary carriers are pro- 

 portionately shorter than in the type, but in other respects the parts are 

 similar. 



L. minima belongs to a group of Lumbrineris species in vi^hich (1) 

 long, simple, hooded hooks are present in some anterior segments, (2) 

 acicula and setae are yellow, (3) posterior parapodial lobes are bilabiate, 

 and (4) the maxillary formula is 1-1, 4-4, 1-1, 1-1. L. minima differs 

 from nearly related species in that the presetal lobe comes to extend dis- 

 tally beyond the postsetal one (pi. 14, fig. 308), the maxillary carriers 

 are comparatively massive, and the mandibles have slender, free basal 

 ends (pi. 14, fig. 314) ; also, the body form is exceedingly long and 

 slender. 



Holotype. — AHF no. 48. 



Type locality. — Anaheim Slough, California (coll. 905-39). 



Distribution. — Anaheim Slough and Mission Bay, southern Cali- 

 fornia ; intertidal ; in sandy mud flats. 



Lumbrineris bicirrata (Treadwell) 

 Plate 9, Figs. 207-212 



Lumbrinereis bicirrata Treadwell, 1929, pp. 1-3, figs. 1-2. 



?L. bifilaris Moore, 1911, pp. 291-294, figs. 135-142; Chamberlin, 1919, 



pp. 327-328, pi. 60, figs. 6-9, pi. 61, fig. 1 ; Treadwell, 1923, p. 9; 



Moore, 1923, p. 257 {not Ehlers, 1901). 



Collections.— ^16-3,^ (1); 879-38 (2); 888-39 (1); 914-39 (1); 



981-39 (1); 990-39 (9); 994-39 (1); 996-39 (about 5); 1010-39 (1); 



1012-39 (1); 1028-39 (1); 1130-40 (1); 1132-40 (1); 1133-40 (1); 



1160-40 (1); 1182-40 (1); 1191-40 (3); 1192-40 (1); 1195-40 (1); 



1200-40 (1); 1214-40 (1); 1220-40 (2); 1228-41 (1); 1229-41 (1); 



1237-41 (1); 1253-41 (1); 1265-41 (1); 1267-41 (1); 1268-41 (1); 



