NO. 3 HARTMAN : SUBMARINE CANYONS 73 



part is 0.8 mm. Setae of the tenth setigerous segment are modified, 

 as characteristic of the genus. The prostomium is broadly trilobed at 

 its frontal margin and has a pair of conspicuous black transverse 

 eye patches, occurring along the posterior margin of the lateral lobes. 

 Branchiae number 4 pairs; they are subulate and attached to form an 

 anterior row of 3 pairs with the medial pair nearly touching at the 

 base, and a fourth pair behind, inserted between and behind the 2 

 innermost pairs. Each branchia is long and tapers distally. Oral 

 tentacles are cirriform and pennate. 



The setae of the tenth setigerous segment are mucronate, slightly 

 shorter than those in front or behind. Each is a broad blade and 

 terminates in a long, slender mucron. Other thoracic setae are simple 

 and tapering distally. Paleae of the first segment form a conspicuous 

 pair of spreading fascicles with about 10 on a side; they are broad 

 bladed and taper distally to a prolonged tip. The tube is close fitting, 

 lined with a smooth, chitinized sheath and externally covered with 

 rounded sand and foraminiferan particles of uniform size. 



These specimens differ from Anobothrus gracilis (see above) in 

 having the modified setae smooth, not spinous, and the paleae mu- 

 cronate, not merely tapering distally. 



Anobothrus spp. 



Coronado en, in 566 m (more than 100), 1265 m (1). 

 Santa Cruz en, in 89 m ( 10) . 

 Tanner en, in 496 m ( 12 ) . 



Glyphanostomum ?pallescens (Theel) 1878 

 Redondo en, north wall, in 554 m (2). The tube is thin, smooth, 

 cylindrical but flaccid when empty; it measures 62 mm long by 0.6 

 mm wide and has transverse dark and light tan bars and is externally 

 adorned with slender siliceous sponge spicules at its distal end. The 

 specimens are ovigerous, and measure about 14 mm long by 0.5 mm 

 wide. Paleae are absent. Oral tentacles are smooth, filiform, numerous 

 and all of one kind. Branchiae number 3 pairs, are inserted in a 

 straight line; each is long, slender or cirriform. The thorax consists 

 of 13 setigerous segments and the abdomen of about 24. 



Lysippe annectens Moore, 1923 

 Redondo en, south wall, in 76 m (2, measure only 6 mm long 

 and are ovigerous), north wall, 120 m (1), 146 m (1 jv), 554 m 

 (10), axis, 611m (4), fan, 652 m (3), -751 m (59), 786 m (4 small). 



