62 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 27 



hooks, and the middorsal approachment of the paired notopodia. They 

 are somewhat elevated, nearly proximal, whereas the corresponding 

 neuropodia are lateral, located at the widest part of the segment. 

 Abdominal notopodial hooks in anterior and middle segments number 

 only 4 or 5 in a transverse series, whereas their corresponding neuro- 

 podia have about 12 hooks in a series; they are disposed so that the 

 distal fang of all notopodial hooks is directed toward the distal fang 

 of all neuropodial ones. 



In middle segments a short, collarlike flange surrounds the seg- 

 ments ; this is located just behind the setigerous elevations. The flange 

 enlarges at postsetal positions to form a pair of semicircular lobes, 

 longer in dorsal and shorter in ventral parapodia. The presence of 

 hooks in these parapodia is obscured by the lobes, but they can be 

 distinguished in neuropodia, where they number 4 or 5 in a series; 

 notopodia have few (2 or 3) to no hooks. 



Decarnastus gracilis has been recovered only from deep parts of 

 longshore canyons, Redondo and JMugu, in depths of 232 to 755 meters, 

 in muds. 



Heteromastus filobranchus Berkeley and Berkeley, 1932 



Monterey en, in 168 m (153), 410 m (47), 750 m (2), 906 m (7). 



Hueneme en, in 98 m (4), 165 m (26), 177 m (225), 183 m 

 (245), 209 m (45), 338 m (2), 373 m (11 and 3), 376 m (8), 

 478 m (9). 



Dume en, in 507 m (6) . 



Mugucn, in 177 m (2), 367 m ( 18 large), 573 m (71), 676 m (3). 



Santa Monica en, in 475 m ( 1 fragment). 



Redondo en, south wall, in 378 m (16 large), 232 m (98+), 

 575 m (1), north wall, 113 m (1), 363 m (102), 554 m (1 fragment), 

 axis, 148 m (24 large), 239 m (10+), 246 m (6), 298 m (54), 344 m 

 (22), 378 m (6), 431m (4), 503 m (28 large). 



San Pedro sea valley, in 319 m (1), 406 m (14), 437 m (1). 



Newport en, in 16 m (? 4), 37 m (1), 83 m (23 large), 97 m 

 (12), 140 m (8), 235 m (24 large), 478 m (6). 



La Jolla en, in 637 m (1 large) . 



Heteromastus sp. 



Mugu en, in 171 m (2 fragments). 

 Santa Monica en, in 542 m ( 1 fragment). 

 Catalina en, in 216 m ( 1 jv). 



Leiochrides hemipodus Hartman, 1960 

 Dume en, in 530 m (l),652m (l),711m (1). 



