64 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



the formula is 15- 19- 15- 19- 15, from left to right side.) The styles are 

 crossed by 5 to 7 dark, oblique bands, alternating with paler bands about 

 equally wide or a little narrower (pi. 2, fig. 46). The papillation of the 

 styles consists of 15 to 17 longitudinal rows, measured near the base, of 

 rather large papillae, the rows slightly irregular, but widely spaced from 

 one another; there are no smaller papillae between them. They are 

 brownish, their color about that of the transverse rows of pigment. 



The first few abranchiate parapodia are larger than those following, 

 provided with a long, slender, triangidar, postsetal lobe and dorsal and 

 ventral cirri. A second has the proportions shown in pi. 2, fig. 47. The 

 dorsal cirri of the first 3 segments are about equally long but exceed in 

 length those of other parapodia. The postsetal lobe and ventral cirri are 

 similarly prolonged but shorter than the dorsal cirrus; the presetal lobe 

 is bidentate, the superior portion the larger. Anterior parapodia are pro- 

 vided with yellow, hooded hooks in which the distal fang is by far the 

 largest, the second tooth is about half as large or smaller, and a more or 

 less minute tooth is immediately below it (pi. 3, figs. 50, 53, 54) ; the 

 latter is sometimes only a tiny rounded boss on the under side of the 

 second tooth (pi, 3, fig. 50), but even in hooks that at first appear bi- 

 dentate the small boss is usually to be distinguished under high magnifi- 

 cations. This tooth is always considerably smaller than the comparable 

 one in D. tridentata (above). In addition, anterior parapodia have 3 

 yellow, pointed acicula (pi. 3, fig. 49) and one or a few very slender, 

 limbate setae. Anterior hooded hooks are present only in the first 3 pairs 

 of parapodia, and thereafter are replaced by simple, shorter, bilimbate 

 setae. Ventral cirri of the first 5 setigers are cirriform; thereafter they are 

 padlike. 



Branchiae are present from the fourth setiger, already large, but ex- 

 ceeded by those of the next few segments; those on the third branchial 

 are the largest. All have a slender, tapering stem, with widely spaced, 

 though regular, short branchial filaments, circumscribing about 10 to 

 15 whorls where best developed. After the fifteenth setiger the branchiae 

 come to be rapidly smaller, but are spiraled through 33 to 40 setigers. 

 The branchial base is long, with about 8 weak annulations on its dorsal 

 side (pi. 2, fig. 48) or smooth. 



Subacicular hooks are present from the twelfth or thirteenth setiger 

 (coll. 930-39) or not until the fifteenth (coll. 1130-40) ; they number 

 2 in a parapodium, as typical of the genus, and are continued through 

 segments to the ends of the pieces ; they are clearly bidentate and hooded 

 (pi. 3, fig. 52). Median and posterior parapodia have 4 or 5 yellow, 



