58 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



segments, including the first few branchial ones, have similar though 

 paler, brownish pigment across the middle, with a broad, sometimes dif- 

 fuse brown spot medially and a paler transverse bar on either side. The 

 intersegmental grooves between the parapodial ridges are usually darker, 

 obliquely striped. In some (coll. 259-34) the pale median spot is missing. 



Most of the specimens are anterior fragments; a few are posterior 

 ends. Length of 40 anterior segments is 17 mm; width in the spiraled 

 region, with parapodia, is about 3.5 mm. The prostomium, like the dor- 

 sum of the body, is diffuse brown, with irregular darker spots scattered 

 over it. Minute eyespots are thought to be present between the bases 

 of the paired tentacles, but they are inconspicuous. Frontal antennae are 

 cirriform, 3 or 4 times as long as broad at the base (pi. 2, fig. 27) ; they 

 are somewhat coarsely papillated. The occipital tentacles are long, slen- 

 der, the longest or inner lateral style is about as long as the first 12 

 setigers. The ceratophores are marked with 12 or 13 nearly equally long 

 rings, or the distal one is the longest. The styles are covered with longi- 

 tudinal rows of fine papillae of 2 kinds, including a granular row of 

 coarser, paler, alternating with a narrow row of finer papillae ; they num- 

 ber 18 to 20 sets around the stj'le near its base. 



The anterior 3 or 4 prebranchial parapodia are larger than those 

 following and are directed laterally. They are provided with a long, 

 dorsal cirrus; a similar though smaller ventral cirrus, only about half as 

 large or smaller; and the setigerous lobe, which has a blunt, triangular 

 postsetal portion set ofif from a short ventral portion resembling the short 

 presetal lobe. The relation of these parts is shown in pi. 2, fig. 28. The 

 setae emerge in a vertical, fan-shaped fascicle between the upper presetal 

 lobe and the short lower one which is adjacent to a longer posterior lobe. 

 The notoacicular fascicle consists of a weak bundle extending into the 

 dorsal cirrus. The neuroacicular fascicle includes 3 heavier acicula. Ven- 

 tral cirri of the first 4 or 5 setigers are cirriform, others are padlike. 



Branchiae are present from the fourth or fifth setiger and continued 

 through about the twenty-fifth ; they are closely spiraled, long, the 

 branchial filaments numerous, forming a bushy top, erected so as to lie 

 over the dorsum or stand upright. The branchial base is closely an- 

 nulated. The largest branchiae are those between the third and seventh 

 pairs. 



Anterior hooded hooks are distally bidentate (pi. 2, fig. 26), present 

 through 4 or 5 setigers; thereafter they are replaced by limbate setae. 

 Neuroacicula typically occur 3 in a fascicle in anterior segments, increase 

 to 4 farther back (pi. 2, fig. 34). They are weakly geniculate, taper dis- 



