centrodorsal of the specimen shown in fig. 6 on pi. 32 of the "Challenger" report; it is almost 

 entirely covered by about forty closely crowded cirrus sockets ; the small bare polar area has 

 a few lono; tubercles. 



The cirri are about XL, 21 — 22, about 10 mm. in length ; the first segment is short, 

 the second nearly or quite as long as the diameter of the expanded distal end, the third half 

 again as long as the diameter of the expanded distal end, the fourth and fifth the longest, 

 twice as long as the diameter of the expanded distal ends; the following gradually decrease 

 in length so that the last four or five are only very slightly longer than broad ; the longer 

 earlier segments have broadly expanded overlapping distal ends, this character becoming less 

 and less pronounced distally, and absolete on the terminal segments where there is only a slight 

 ventrolateral overlap; the short distal segments develop a slightly carinate dorsal spine. 



The radials are very short in the median line, but extend well up in the angles of the 

 calyx so that the bases of the IBr t are not in apposition. 



The IBr-j are very short, about five times as broad as long in the median line, slightly 

 longer laterally than centrally; the lateral borders are parallel; the distal edges, except in the 

 median line, are everted and finely spinous; the proximal border is slightly everted ; there is 

 a tuft of spines on the distal angles. 



The IBr 2 (axillaries) are almost triangular, slightly broader than long; the distal edges 

 are slightly everted and very finely spinous; the lateral angles are covered with spines. 



The IBr series and lower brachials are in lateral contact except for small "-)-" shaped 

 water pores. 



The arms are about 30 mm. long; the brachials have only very slightly produced and 

 very finely spinous distal ends. The distal intersyzygial interval is two oblique muscular articulations. 



The specimen of " Antedon a/temaia" represented in fig. 6 of pi. 32 of the "Challenger" 

 report, which was dredged north of New Guinea. in 1926 Metres, certainly belongs to the genus 

 Nepiometra, and very possibly to this species. 



5. Nepiometra parvula (Hartlaub). 



Hartlaub. Buil. Mus. Comp. Zool., vol. 27, 1895, X° 4, p. 144, pi. 3, fig. 21 {Antedon parvula). 



Phrixometra A. H. Clark. 



The only species in the genus Phrixometra is 

 1. Phrixometra longipinna (P. H. Carpenter). 



P. H. Carpenter. "Challenger" Reports. Comatulae, 1888, p. 185, pi. 30, figs. 1 — 3 {Antedon 

 longipinna). 



Bathymetra A. H. Clark. 

 Key to the Species of the Genus Bathymetra. 

 a 1 Centrodorsal low, subconical, about half as high as broad, the cirrus sockets 



