NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 59 



Distribution. — Monterey Bay (Holotype), south to southern Cah'- 

 fornia; Farallon Islands, Anacapa Island, Santa Barbara Island, Cata- 

 lina Island, California; Galapagos Islands; Chatham Bay, Cocos Island. 

 In 10 to 65 fms. It is apparently rare or absent from Lower California, 

 Mexico, and areas south, where its nearly related species, E. hancocki 

 (see below), is found. The extra-California specimens are pygmies com- 

 pared with those from Monterey Bay and south-central California. 



Eusigalion hancocki, new species 

 Plate 12, Figs. 141-145, 148-152 



Collcctiom.—66-?,?>, 74-33, 126-33, 208-34, 701-37, 745-37, 747-37, 

 769-38 (Holotype). 10 specimens. 



Length of 66 anterior segments about 40 mm; greatest width be- 

 tween segments 15 to 25. Surface smooth, glistening, the midventrum 

 with a slightly thickened ridge in the region between the longitudinal 

 muscle bands. Lower lip with about 12 longitudinal grooves. 



Prostomium trapezoidal, slightly longer than wide, the anterior 

 margin with a median convexity, the posterior margin nearly straight 

 (pi. 12, fig. 144). Prostomial antennae small, papillar, the paired ones 

 inserted at the anterior margin, the median between the anterior pair 

 of eyes. In some individuals they are dusky at their tips. The 4 minute 

 black eye spots are on the anterior half of the prostomium. They are 

 deep seated and seen only when looking directly over the area where 

 they are located. A supraoral, biarticulated antenna is inserted medially 

 just over the mouth aperture. Palpi are white, long, slender, smooth, 

 extending posteriorly to the seventh segment when directed backward. 



Branchial cirri simple, cirriform, present from fifth setigerous seg- 

 ment, the first as large as those more posterior; they are curved out- 

 ward and slightly directed toward the preceding parapodium (pi. 12, 

 fig. 143). Dorsal cirri (pi. 12, fig. 145) are proportionately larger than 

 those in E. spinosum. Ventral cirri are slender, tapering, extending dis- 

 tally beyond the parapodia in the anterior region but becoming gradu- 

 ally shorter to about the fortieth segment (pi. 12, fig. 145). 



Elytra are white or slightly fulvous; they completely cover the dor- 

 sum and the bases of the parapodia. The first pair is oval, the others 

 broad, their ectal margins with a delicate fringe of subpalmately 

 branched papillae (pi. 12, fig. 141), otherwise the margin is entire. 



