148 DISCOVERY REPORTS 



pale straw with a dark bluish tinge in places. In one specimen the bluish tinge is con- 

 fined to the outer pinnules. In the others it occurs on some of the brachials and the 

 basal segments of some of the pinnules : it is always strongest on the brachials of the 

 syzygial pairs and the bases of the pinnules arising from them and is sometimes present 

 only on these ossicles. In one specimen the syzygial pairs stand out as dark bands along 

 the whole length of the arm, darkest along the middle arm. There is no blue coloration 

 on the calyx, the centrodorsal or the cirri. In one specimen the centrodorsal and radials 

 are yellow. 



One of the specimens was infested with two cysts of Myzostomum cysticoliim. 



Distribution. There are in the British Museum collection eight specimens of this 

 species from the Ross Sea which had been labelled Anthometra adriani or Solanometra 

 antarctica. One is from Discovery Winter Quarters and another two are Discovery 

 specimens labelled "Mt Erebus and Terror". The remaining five are Terra Nova 

 specimens (see p. 220). 



The species is then known from the coast of the continent in the Ross Sea, Indian 

 Ocean and Weddell Sea sectors of the Antarctic ; it is not known from any of the out- 

 lying islands. 



Florometra antarctica, n.sp. (Plate III, fig. 3) 



St. 180. ii.iii. 27. SchoUaert Channel, Palmer Archipelago. 160-33001. Gear OTL. Bottom: 

 mud and stones. Two specimens. 



St. 599. 17.1.31. Adelaide Island. 67° 08' S, 69° o6i' W. 203 m. Gear DLH. Bottom: no 

 data. One specimen. 



Description. One of the three specimens is nearly complete and has arms about 

 95 mm. long. In another, less complete but more massive, the arms must have been 

 over 100 mm. long. The third specimen is smaller, with arms so broken that it is im- 

 possible to estimate their length when complete. 



The centrodorsal is a large rounded cone closely covered with cirrus sockets arranged 

 in regular or fairly regular columns (Fig. 4 o). The dorsal pole is rounded and rough in 

 two of the specimens, sunken in the third. 



Cirri LXIX-LXXVII, 23-32, usually 27-32. The cirri are long and strong, much 

 longer in proportion to the length of the animal than in Florometra mawsoni, particularly 

 so in the largest specimen. The first two segments are short, the third is about as long 

 as broad. The fourth is twice as long as broad and fairly strongly waisted. The fifth 

 to about the ninth are about two-and-a-half times as long as broad and faintly waisted. 

 Beyond the ninth the segments gradually decrease in length though all are longer than 

 broad. The distal segments possess a strong dorsal spine, the apex of which is sub- 

 terminal. The opposing spine and the terminal claw are strong (Fig. 4 b). 



In the specimen with arms 95 mm. long the basal rays are visible externally as small 

 triangular plates (Fig 4 a). In the other two specimens, the largest and the smallest, 

 I can see only four basal rays. 



The radials are short, especially in the mid-line, because their distal edges are strongly 



