iSS 



I i ntrodorsal small <>r of medium size, sharply eonical, the cirrus sockets arrai 

 in five more or less irregular columns one in the midline of each radial area; 

 i long, from one fourth to one third of the arm length 



cirri numerous, with numerous segments, XX XXV, 26—28, 



55 mm. to 60 mm. more than one fourth of the arm length, equal to the 



distance from the axillary to the forty-sixth brachial; arms 211 mm. long 



I imor to the Philippine Islands; 5211 675 Metres) 



robusta 



b si/c small: cirri less numerous with fewer segments, XV, 18, 27 mm. long, 

 about one third of the arm length, equal to the distance from the axillary to 

 the twentieth brachial; arms 75 mm. long (Meangis Islands; 900 Metres) aculeata 



1. Chondrotnetra rugosa nov. sp. 



5., i23°4o E. Timor Sea. 520 Metres. 1 Ex. 



Centrodorsal very large, truncated eonical, almost columnar, 9 mm. broad at the base, 



mm. across the slightly convex dorsal pole, and 7 mm. high interradially ; the cirrus 



socki arranged in ten regular columns, two to each radial area; the columns in each 



radial area are almost or quite in contact which each other; the columns of adjacent radial 



■ are separated by a narrow and irregular bare area, which may show a slight narrow 



rounded ridge in its centre; there are three cirrus sockets to a column. 



The cirri an- XXX, iS —19, 35 mm. long, stout and short; the first segment is very 

 short, the second is about twice as broad as long, and the following gradually increase in 

 length so that the fifth is about as long as the median or distal diameter; the remaining 



segments are all about half again as long as the proximal diameter; the 



lasi five decrease rather rapidly in diameter so that the pcnultimate 



ment and the terminal claw are very small. After the first four 



arents the cirri become rather strongly compressed laterally: the ends 



of the segments are slightly swollen and prominent. 



'1 he ends of the basal rays are visible as small tubercles in the 

 angles of the calyx; the radials are entirely concealed ; the IBr, are almost 

 co: ;, but their distal portion, which is more or less irregular and 



tubercular, is visible as a narrow band just below the axillaries. 



The proximal brachials have the same prominent median tubercles 

 as tho C. robusta, but they are pointed instead of being rounded as 



rai view of the proxi- i n that and they lean somewhat anteriorly, so that they appear 



mal p 



Na . as broad stout overlapping >pines. Instead of being |)erfectly smooth as 

 f ' he in C. robusta, the distal borders of these earlier brachials are thickened 



Museum). 



and produced; 1 thickened and produced borders after the first six 



or seven brachials bear, beside the large broad median spine (of which the base runs backward 



along the whole median line of the dorsal surface of the segment) one or two smaller and 



pointed spines between the median spine and the lateral cd^c which do not involve the 



al surface of the segment. 





