454 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



though these scarcely occur beyond PI O . As an example, on one arm there are combs 

 on P s and P 9 . The disk is 3 mm. in diameter. The mouth is subcentral. The 

 anal funnel is large, swollen, and papillated, 1.5 mm. high. The color is light gray 

 brown, with the disk dark brown. 



In the specimen from Bock's station 59 the centrodorsal is 2.2 mm. in diameter, 

 the bare dorsal pole being 1 mm. across. 



The cirri are XVII, 10-11, from 5 to 7 mm. long, and are arranged in a single or 

 double row on the centrodorsal. The first segment is short, the second is half again 

 as long as broad and is somewhat constricted centrally, the third is three times as 

 long as broad, and the fourth is somewhat shorter, two and one-half times as long 

 as broad. The fifth is a transition segment. The dorsal spines are small and indis- 

 tinct, and are situated on the distal portion of the segments. The penultimate seg- 

 ment is about as long as broad. The opposing spine equals in height about one-fifth 

 the width of the penultimate segment. The terminal claw is about twice as long as 

 the segment which bears it and is strongly curved. 



The radials are concealed by the centrodorsal. The IBr, are four times as 

 broad as long, and are partly concealed by the centrodorsal. The IBr 2 (axillaries) 

 are almost triangular, three times as broad as long. The elements of the IBr series 

 are united by syzygy. The IIBr series are 4 (3 + 4), and the IIIBr series are 2 (1 + 2). 

 Beyond the IBr axillary the distal edges of the ossicles of the division series and of the 

 brachials are everted and very spiny. 



The 28 arms are from 50 to 70 mm. long, and 0.7 mm. in width. The first 7 

 brachials are oblong, and those succeeding have oblique ends. There are 16 brachials 

 in 10 mm. of arm length, or 12 if syzygial pairs are counted as units. The distal 

 brachials are half again as long as broad, slender and centrally constricted. 



Syzygies occur between brachials 1 + 2, 10 + 11, 14 + 15, and 18 + 19 on all arms 

 except those originating from a IBr axillary, on which the first syzygy is between 

 brachials 3+4. 



P D and PI are 6 mm. long and are composed of 25-30 segments of which the 

 first 11-13 have very spiny distal frills; the terminal comb has 6 teeth. P 2 is 5 mm. 

 long with about 23 segments of which the 7 basal are spiny. P 3 is 3 mm. long with 

 about 20 segments. P 4 is 2.5 mm. long with about 15 segments of which 5 bear teeth. 

 The first 4 or 5 pinnules carry combs, which occur beyond on every second or third 

 pinnule to about the twentieth. The teeth of the combs are half again as high as 

 the width of the segments that bear them. The distal pinnules are 6.5 mm. long 

 with 20 segments which, except the basal, are twice as long as broad with swollen and 

 spinous ends. 



The disk is 6 mm. in diameter, smooth and without granules. The mouth is 

 central and the anal tube, which is papillated, is marginal. 



The color is brownish. 



Localities. Albatross station 4893; Eastern Sea, from 10 to 20 miles southwest 

 of the Goto Islands; Ose Saki light bearing N. 29 E., 5.5 miles distant (lat. 32 

 32' 00" N., long. 128 32' 50" E.); 174-194 meters; gray sand, broken shells, and 

 pebbles; bottom temperature 13.28 C.; August 9, 1906 (1, U.S.N.M., 36284). 



