26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



The cirri are XXX, 26-34, 30 mm. to 35 mm. long, stout ; the sixth- 

 or seventh-eighth segments are the longest, slightly broader than 

 long to half again as broad as long ; the segments in the outer half 

 of the cirri are about twice as broad as long; the outer segments are 

 slightly carinate, the carination on the last six or seven terminating 

 distally in a small spine. 



The forty-six arms are 140 mm. long ; nine of the IIBr series are 

 4 (3 + 4), and one is 2 ; the IIIBr series are all 4(3+4) except one 

 (internal) ; the remaining division series are all 4 (3 + 4), except 

 two IVBr series which are 2 ; the division series are strongly convex 

 and widely separated, as is usual in the genus. 



The proximal pinnules are about 20 mm. long with from seven- 

 teen to twenty segments, very stout and nearly smooth, the distal 

 edges of the segments being only very slightly swollen ; all the seg- 

 ments are short, about twice as broad as long in the proximal half of 

 the pinnules, becoming about as long as broad toward the tip. 



Remarks. — This species is very similar to the succeeding, but the 

 cirri are larger and rather stouter and the proximal pinnules are 

 shorter, about as stout in the proximal part but tapering more rapidly 

 and without the flagellate tip ; the segments in the outer part of these 

 pinnules also do not possess the strongly everted distal edges seen in 

 those of H. sol. The cirri of H. robustipuina are in their details much 

 the same as those of H. sol but for the presence of a distinct, though 

 small, spine on the last five or six segments ; that on the antepenulti- 

 mate is nearly as large as the opposing spine. 



HIMEROMETRA SOL A. H. Clark 



Antedon palmata 1902. Bell, in Gardiner, Fauna and Geography of the Mal- 

 dive and Laccadive Archipelagoes, vol. 1, part 3, p. 224 (1, 2). 



I. Kolumaduli, Maldives ; 38 fathoms. — The centrodorsal is thick 

 discoidal, with a strongly concave dorsal pole 4 mm. in diameter. 



The cirri are XXI, 25, 27, 28, and 30, 25 mm. to 30 mm. long ; the 

 longest segments, in the proximal third, are nearly or quite as long as 

 broad ; the distal segments are slightly broader than long, sometimes 

 as much as one-third broader than long ; the terminal ten or twelve 

 have a small and low median dorsal tubercle, sometimes scarcely 

 noticeable until near the end of the cirrus ; the opposing spine is well 

 developed and conspicuous. The cirri as a whole are stout, stouter 

 than those of the other species of the genus, with approximately sub- 

 equal segments. 



The forty-one arms are 140 mm. long; the IIBr series are 4 

 (3 + 4) ; the IIIBr series are 4 (3 + 4) externally, 2 internally; 



