64 University of California Puhlicatwns in Zoology [Vol.18 



with transverse rows of branchiae and setae except a narrow mid- 

 dorsal bare line. The ventral surface is convex. The segmentation 

 is well marked by transverse folds. The corresponding numbers of 

 segments of the two specimens are 20 and 28. The caruncle (pi. 4, 

 fig. 1) is coalesced with the prostomium and is dorso-ventrally bilobed. 

 The posterior free end of the caruncle extends almost to the poste- 

 rior margin of the fourth segment. The anterior end of the caruncle 

 bears a tentacle consisting of a heavy basal portion and a prominent 

 style, about the same length. At the base of the tentacle is a pair 

 of large dorsal eyes. Another pair of smaller eyes is situated ventrally 

 between the peristomial parapodia (pi. 4, fig. 7). 



The parapodia are of the usual kind. The dorsal and ventral 

 rami are distinctly separated. The dorsal ramus or notopodium 

 merges into the dorsum, extending nearlj^ to the mid-dorsal line, cover- 

 ing with its numerous setae and branchiae the greater part of the 

 dorsum. There are three cirri, one ventral and two dorsal. The 

 ventral cirrus is inserted between the ventral setae, its distal end 

 reaching to the tips of the ventral setae. One of the two dorsal setae 

 occurs on the dorsum immediately posteriad of the first dorsal trunk 

 of branchiae. The second cirrus is situated between the second and 

 third gill-trunks (counting from the dorsal extremities of the series). 

 The dorsal cirri are stout, slightly tapering toward the distal ends. 

 They are of about equal length with the branchiae, and about one- 

 half of the length of the dorsal setae. 



There are six main trunks of branchiae on each parapodium. Each 

 trunk is subdivided into three or four finger-like projections (pi. 4, 

 figs. 13-14). Anterior to each transverse row of branchiae is a row 

 of numerous brown, forked setae (pi. 4, fig. 2). They are bifid, long, 

 tubular, and hollow, with the distal end of the longer projection 

 slightly tapered and the tip slightly curved. One type of dorsal setae 

 only is present, although the setae vary in size. The ventral setae are 

 similar in shape to the dorsal. They are long, one-half the width of 

 the bod}^, hollow, brittle, with the tips obtusely rounded (pi. 4, fig. 3). 

 The setae and the branchiae incline anteriorly near the anterior por- 

 tion of the body (pi. 4, fig. 1), and posteriorly on the posterior portion 

 of the body. 



The buccal region extends to the fifth segment (pi. 4, fig. 7). The 

 caudal cirri (pi. 4, fig. 6) are fleshy and obtusely rounded. 



Comparison. — This species has been previously classified by Tread- 

 well as Euphrosyne aurantiaca Johnson. It resembles the latter at 



