1 1 1 



first terminal, but becoming median on about the fifth er sixth; on the antepenultimate segment 

 tliis becomes ;i single small median spine; the opposing spine is long, median, erect, very 

 much longer than the minute spine on the preceding segment, equal to about half the lateral 

 diameter of the penultimate segment in height; the terminal claw is about half again as long 

 as the preceding segment, stout in the basal third but becoming slender in the distal two-thirds, 

 strongly curved basally bul becoming nearly straight distally; the dorsal surface of the cirri is 

 broad arnl flat, rather abruptly separated from the lateral surface. 



rhe radials are almost entirely concealed by the centrodorsal; the IBrj is very short, 

 three and one half times as broad as long. widely s< parated from its neighbours laterally: the 

 [Br is broadly pentagonal, twice as broad as long; the synarthrial tubercles are moderately 

 developed. The dorsal surface of the arms is almost smooth. 



1' is absint: P, is 9 mm. long with 24 segments ut which the first is twice as broad 

 as long and the following gradually increase in length becoming about as long as broad on 

 the fourth and thereafter slightly longer than broad. 1\, is similar, but slightly longer and 

 slightly stouter. 1' is similar, but somewhat smaller and shorter than P v 7 mm. long with 16 

 segments; 1', is 4.5 mm. long with 15 segments of which the distal are elongate; the following 

 pinnules are similar: the distal pinnules are very slender, 12 mm. long. 



The colour is yellow brown with purplish blotches on the arms; the outer half of the 

 cirri is purplish. 



Another specimen has 14 arms 120 mm. long; all four of the IIBr series are 4(3 + 4); 

 the cirri are XVI, 23 — 24 (usually 23), 15 mm. long; the dorsal pole of the centrodorsal is 

 slighüy concave, 3 mm. in diameter. P, is S mm. long. P, is 9.5 mm. long with 22 segments. 

 I' i> 6.5 mm. long. P 4 and the following pinnules are 4.5 mm. long, very delicate; the large 

 proximal pinnules are somewhat stiffened. The distal pinnules are o mm. long. The colour is 

 the same as in the preceding. 



The third specimen is small; it has 10 arms 55 mm. long. 



Cyllometra A. H. Clark. 



I\'\ to the Species of the Genus Cyllometra. 



a 1 The proximal cirru> segmi nts are longer than broad, and may be twice as 

 long a^ broad or even longer 



cirri of moderate length and stoutness, the distal segments broadcr than 

 g; the cirrus segments beyond the basal bear long and prominent 

 dorsal spines which at first are simplj forked, then usually tridentate, 

 later transforming into a high dorsal process with a straight edge 

 parallel to the distal border of the .egment, which gradually becomes 

 a simple high dorsal spine; 11 — 20 arms (Philippine Islands). . disciformis 

 '•irri long and slender with the distal segments longer than broad and 

 ring minute dorsal tubercles; usually 25- 30 arms Li er Sunda 

 Islands) gracilis 



