i64 DISCOVERY REPORTS 



So far as can be seen the disk is not plated. The anal cone is very high, higher than 

 the level of the second syzygy. 



The sacculi of the distal pinnules are regularly arranged. 



There are three or four side-plates to a segment (Fig. 9 e). Each is a long straight rod 

 arising from a branching or reticulate base, with an end which is thorny or slightly 

 branched, or expanded into a small reticulate plate, smaller than that at the base ; the plates 

 of the proximal segments are more simple, those of the distal more complex. Continuous 

 with the end of each plate is a row of knobbed and curved rods, the end of one overlapping 

 that of the next, arranged in an arc which travels backwards (towards the base of the 

 pinnule) and inwards ; they appear to lie along the edge of the marginal lappets. I see 

 no spicules in the tentacles. 



The colour in life was described as : " Dark grey markings on a white ground. General 

 effect grey." It remains so in spirit. The dorsal surfaces of the radials, the ossicles of 

 the division series and the brachials are dusky grey, though the proximal edges of the 

 brachials may, like the muscular articulations, be white. The pinnulars, especially the 

 lower pinnulars of the distal pinnules, are of a darker colour than the brachials ; the 

 slightly swollen articulations are white. The cirri appear white in comparison with the 

 rest of the animal ; a few of the basal segments, the penultimate segment and one or two 

 of those preceding it may be of a dusky tinge ; the terminal claw is hyaline. The disk is 

 yellowish ; the anal cone and the ambulacra of the disk, arms and pinnules, are darkly 

 pigmented. 



Subfamily BATHYMETRINAE 



Genus Phrixometra A. H. Clark 



Phrixometra longipinna (P. H. Carpenter) var. antarctica n.var. 



(Plate IV, figs. 5 and 6) 



St. 156. 20. i. 27. Off South Georgia. 53°5i'S. 36° 21' 30" W. 200-236 m. Gear DLH. 

 Bottom: rock. One specimen. 



St. 1948. 4. i. 37. East of Clarence Island. 60° 49-4' S, 52° 40' W. 490-610 m. Gear DRR. 

 Four specimens. 



The specimens from two localities that I describe here as belonging to one new 

 variety differ in some ways from one another. I have thought it better to describe the 

 specimens from each station separately rather than to draw up one description wide 

 enough to cover them all. A partial re-description of P. longipinna follows the descrip- 

 tion of the variety. 



Description. The specimen from St. 156 is a rather broken female. None of the 

 arms is complete; the longest is of 35 brachials and 20 mm. long; it seems probable that 

 the arms were 25-30 mm. long in life. Most of the cirri are retained but many are 

 incomplete. 



The centrodorsal is a rounded cone with a rather large and rough dorsal pole. The 

 cirrus sockets are closely crowded; they are arranged in indistinct columns, not nearly 



