108 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 25 



present from near the middle of the body, at neuropodium 17 or later; 

 they begin gradually as 2 bifid spines alternating with 3 slender, pointed 

 setae. The corresponding notopodia have 5 or 6 capillary setae. This 

 arrangement is continued posteriorly through about 30 segments. In 

 the posterior fifth of the body the notopodium has one acicular spine, 

 accompanied by 3 distally pointed setae, and within 2 or a few segments 

 there are 2 such spines, resembling those in neuropodia. The ventral 

 spines increase to 6-8 in a transverse series, and in far posterior seg- 

 ments the number of spines in notopodia and neuropodia is about the 

 same. They occur in discrete fascicles and never form cinctures about the 

 body. The posterior end of the body terminates in a depressed anal 

 flange as long as the last 2 or 3 segments of the body. 



Caulleriella harnata was first described from Alitak Bay, Alaska ; it 

 has been found in southern California, in sediments of silt and shelly 

 debris at shelf depths. It may occur more widely throughout the north- 

 eastern Pacific Ocean, in subintertidal depths. 



Caulleriella alata (Southern) 1914 



Chaetozone alata Southern, 1914, pp. 112-113, pi. 12, fig. 27. 

 Caulleriella viridis pacifica Berkeley, 1929a, p. 307. 

 Caulleriella alata Berkeley and Berkeley, 1950, p. 57; Berkeley and 

 Berkeley, 1952b, p. 36, fig. 64. 



Collections. Southern California, in mixed sediments at shelf depths 

 (many). 



Length is 15 to 20 mm. The prostomium is acutely pointed in front 

 and has a pair of dark, deeply embedded eyes at the sides. All neuropodia 

 have acicular spines that are distally bifid ; in anteriormost segments 

 they are accompanied by a few very slender capillary setae ; farther back 

 they gradually thicken and the accessory slender setae are frequently 

 absent. Notopodia of anterior segments have only capillary setae. At 

 about segment 20 one or two acicular spines are present with the 

 slender setae ; they gradually increase in number and thickness to re- 

 semble the spines in neuropodia. 



Caulleriella alata was first described from Ireland (Southern, 1914) 

 and has since been reported from western Canada south to southern 

 California (Berkeley and Berkeley, 1952a, p. 36). Based on finds from 

 quantitative samples from southern California, it is abundant only in 

 shallow sublittoral seabottoms. 



