Xlg BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



segments bear dorsal spines. The penultimate segment is as long as broad. The 

 terminal claw is stout and half again as long as the penultimate segment. A young 

 cu-rus has the fourth-seventh segments somewhat longer, twice as long as broad. 

 The IBr, are five times as broad as long, free laterally. The IBro (axillaries) are three 

 times as broad as long, with the distal edges slightly everted. There is a slight synar- 

 thrial tubercle on the articulation between the elements of the IBr series. There 

 are 15 (perhaps 16) arms 65 mm. in length. The IIBr axillaries are interiorly united 

 for most of their length. Syzygies occur between braclaials 1+2, 3 + 4, 14 + 15, 

 23 + 24, or 13 + 14 and 18 + 19, and distally at intervals of 5 or 6 muscular articula- 

 tions. The proximal portion of the arms is not quite smooth. The first 8 brachials 

 are discoidal, those following becoming wedge-shaped. The distal brachials are 

 tolerably short with spinous distal edges which sometimes are everted and stand out 

 hke a collar. 



The first 6 pinnules bear combs. Pi is 9 mm. long with 36-38 segments, of 

 which 18 bear teeth; the teeth are rather short, reaching a length of from one-half 

 to one-thii'd the width of the segments. P2 is 6.5 mm. long with about 30 segments, 

 of which 15-17 bear teeth. The following 3 pinnules decrease in length. Ps is 4.5 

 mm. long with 22 segments, of which 12 bear teeth. The distal pinnules are from 

 5 to 6 mm. long with 17-18 segments. The disk is 8 mm. in diameter. The mouth 

 and anus are subcentral. The anal funnel is 1.5 mm. high. 



In the other specimen from station 59 the centrodorsal is pentagonal in outline, 

 3 mm. in diameter with the bare dorsal pole 2 mm. across. The cirri are XXV, 

 15-19, 9 to 11 mm. in length. The fourth and fifth segments are the longest, three- 

 quarters again as long as broad; the sixth is a transition segment. The arms are 13 

 in number, 55 mm. long. The intersyzygial interval is from 4 to 6 muscular articu- 

 lations. Pi is 9 mm. long with 38 segments, of which 19-22 bear teeth. P4 is 7.5 

 mm. long with 30 segments, of wliich about 18 bear teeth. Pj is 4.5 mm. long with 

 17 segments, and Pj is 4 mm. long with 15 segments, without a comb, but with dorsal 

 hooks and, as in the preceding pinnules, with small spiny knobs on the outer side of 

 the proximal segments. The distal pinnules are 6 mm. long with 19 segments, 

 somewhat longer than broad, with spiny borders, and the last 6 with dorsal hooks. 

 The disk is 6.5 mm. in diameter. 



Abnormalities. — In the specimen from Siboga station 96, one of IIBr axillaries 

 bears a pair of pinnules instead of the usual 2 arms. 



Localities.— Selomon, from reef; Sea Lark, June 8, 1905 [Bell, 1909; A. H 

 Clark, 1911] (1, B. M.). 



Coin Peros [Bell, 1909; A. H. Clark, 1911]. 



Hulule, Maldives; west reef [Bell, 1902; A. H. Clark, 1913] (1, B. M.). 



Ceylon; Doctor Sarasin, 1886 [Reichensperger, 1913]. 



West Java; J. F. van Bemmelen, 1894 [A. H. Clark, 1911] (1, L. M.). 



Siboga station 96; Sulu (Jolo) archipelago, Philippines; southeastern side of the 

 pearl bank; 15 meters; lithothamnion bottom; June 27, 1899 [A. H. Clark, 1918] 

 (l.U.S.N.M., E. 390). 



Dr. Th. Mortensen's Pacific Expedition 1914-16; off Jolo (Sulu); coral reef; 

 March 17, 1914 (1). 



