NO. 2 HARTMAN, BARNARD: BENTHIC FAUNA OF DEEP BASINS 1 17 



a short anterior end of 19 segments measuring only 8.0 mm long; it has 

 all branchiae cirriform but the last, which are pinnate only along an 

 outer edge. Postsetal lobes of anterior segments are broad at the base and 

 taper to slender tips, and neuropodial hooks are not present before seg- 

 ment 19. 



The specimens from Tanner Basin and Patton escarpment are char- 

 acterized by having both pinnate and cirriform branchiae. 



Genus SPIOPHANES Grube, 1860 

 Spiophanes fimbriata Moore, 1923 



Moore, 1923, pp. 179-182. 



Hartman, 1941, p. 290. 



Laonice sacculata Hartman and Barnard, this volume, p. 52. 



Numerous specimens were taken in San Pedro, San Nicolas, West 

 Cortes, Velero and Tanner Basins. Largest individuals measure about 

 22 mm long by 2.8 mm wide and consist of 40 or more segments. The 

 prostomium is depressed triangular, lacks eyes or has 2 to 4 very weakly 

 developed small spots. There is a long, slender occipital antenna. The 

 dorsal fimbriated folds are prominent on segments 24 to 29. Lateral, 

 interramal pouches are present from about segment 25 and continue back 

 through many segments. Neuropodial hooks are first present at segment 

 15-19, and genital spines from segment 15, as a single, sickle-shaped, 

 ventralmost seta. 



The palpi are unique for having a double crenulated border along 

 their entire length except at the thick base. The anal end terminates in a 

 circlet of 12 long, slender filaments, some of which are bifurcated at the 

 free end. The first 4 notopodial pairs are elevated above the others and 

 have a long, triangular, distally tapering postsetal lobe. The first setiger 

 has a large, recurved spine at the inferior end of the setal fascicle, its tip 

 directed down and back. Similar spines, decreasing in size, are present 

 through more posterior segments. Hooded hooks are tridentate, with the 

 3 teeth in a straight row. 



Spiophanes fimbriata approaches S. cirrata Sars, reported from west- 

 ern Canada (Berkeley and Berkeley, 1952, p. 24), except that the latter 

 has the frontal margin of the prostomium laterally prolonged and there 

 are 4 large black eyespots ; the nuchal ridge extends farther back than in 

 S. fimbriata. The latter is known only from southern California, in mod- 

 erate and basin depths. 



