568 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



P D is 19.5 mm. long and bears a comb consisting of 10 very indistinct teeth; the 

 tip is smooth. PI is 16 mm. long. P 2 is 9.5 mm. long and bears a very feebly devel- 

 oped comb. P 3 is 6 mm. long and is without a comb. The distal pinnules are 

 10.5 mm. long with 22 segments. On all the pinnules the second-fifth or -sixth 

 segments have small prominences, and the terminal 3 or 4 bear dorsal hooks. 



The disk is 17 mm. in diameter and is naked. The anal tube is central and is 

 4 mm. high. All the arms are grooved. 



The color in alcohol is brown. 



Another specimen from Mortensen's station 1 has the cirri XXXVII, 16-21, 

 from 9 to 15 mm. long. The 18 arms are 65 mm. long. There are distinct inter- 

 spaces between the proximal division series. The disk is 16 mm. in diameter. 



In a third specimen from Mortensen's station 1 the cirri are XXII, 19-22, from 

 14 to 18 mm. in length. The 22 arms are about 80 mm. long. The division series 

 are rather close together. The disk is 21 mm. in diameter. 



The fourth specimen from Mortensen's station 1 has the centrodorsal 2 mm. in 

 diameter. The cirri are XXVII, 15-19, from 8 to 12 mm. long. The 20 arms are 

 65 mm. in length. All of the arms are grooved. P 2 and the pinnules preceding bear 

 combs. The anal tube is central and is inconspicuously inflated. 



One of the specimens from Mortensen's station 27 has the cirri about XT/IT, 

 20-24, from 12 to 22 mm. long. The 35 arms are from 100 to 120 mm. long. The disk 

 is 22 mm. in diameter. 



In the other specimen from Mortensen's station 27 the cirri are about LV, 20-23, 

 from 15 to 20 mm. long. The 36 arms are from 100 to 120 mm. long. 



In the specimen from Bock's station 20 the centrodorsal is 10 mm. in basal 

 diameter, with the bare dorsal pole 8 mm. across. The cirri are arranged in 2 rows. 



The cirri are about LX, 20-24, from 14 to 23 mm. long. 



The 40 arms are from 105 to 120 mm. in length. The IIBr and IIIBr series are 

 4 (3 + 4). The division series and arms resemble those in the first specimen from 

 Bock's station 38. 



P D is 28 mm. long with about 50 segments. The pinnule on the IIIBr series is 

 about 20 mm. long and bears a comb consisting of 6-8 very short teeth, the terminal 

 5-6 segments being smooth. Pj is shorter. P 2 is about 10 mm. long. P 3 is 7 mm. 

 long, and is without a comb. The distal pinnules are 9 mm. long. 



The disk is 28 mm. in diameter. The anal tube is 6 mm. high. 



In the specimen from Bock's station 28 the centrodorsal is 10 mm. in basal 

 diameter, with the free dorsal pole 7 mm. across. 



The cirri are LV, 20-26, from 12 to 22 mm. in length. 



The IBr, are partly visible. The IBr 2 (axillaries) are almost triangular, and are 

 half again as broad as long. The IIBr and IIIBr series are 4 (3 + 4). The sutures 

 between the IIBr and IIIBr segments are slightly visible. The division series are 

 not quite so smooth as in the first specimen from Bock's station 38. 



P D is 24 or 25 mm. in length, and is composed of about 55 segments of which 

 10-12 bear indistinct teeth which in height equal about one-third the width of the 

 segments. The pinnule on the IIIBr series, P,, and P 2 are shorter. P 3 bears a small 

 comb. The genital pinnules are 10 mm. long. The distal pinnules are 11 or 12 mm. 

 long. 



