A MONOGRAPH OF THE EXISTING CRINOIDS 13 



The edges are thickened, but smooth. There is a short spine at each angle The 

 median keels of the first two brachials are lower than those on the preceding ossicles, and 

 the crest is smooth and straight. The first syzygial pair (composed of brachials 3+4) 

 is somewhat broader than long. The carinations on the hypozygal and epizygal are 

 not continuous, that on the epizygal being displaced outwardly. The next four seg- 

 ments are irregularly oblong, about three times as broad as the median length. Those 

 succeeding are very obliquely wedge-shaped, about twice as broad as the longer side, 

 terminally becoming less obliquely wedge-shaped and about as long as broad The 

 arms are strongly compressed laterally, and the brachials are strongly cannate, the 

 carination being produced distally into a conspicuous curved overlapping spme 



Svzvsies occur between brachials 3+4, agam from between brachials 29+30 to 

 between brachials 47+48 (usually between brachials 35 + 36, or near that point), and 

 distally at intervals of 5-7 (usually 6) muscular articulations. 



Pi is 7 mm. long with 14-15 segments, moderately stout and tapering evenly to the 

 tip The proximal outer side is strongly rounded. The ventral edges and the cannate 

 line on eacb segment are produced into high thin processes with a straight or more or 

 Z convex creL P 2 resembles P„ and is nearly as long and large. P 3 » smaller and 

 shorter, and the pinnules following are shorter still. 



The color in alcohol is light brown, with the outer two-thirds of the cirri lighter 



Comvarisons -This species resembles S. dicukma from southern Japan but it is 



larger aZ stouter with stouter cirri which have somewhat stouter segments ; the carina e 



profess" on the division series are higher and more even, and there is a considerable 



and conspicuous development of spines interradially on the division series and arm 



h&SeS parasite.-A small parasitic gastropoid (TMAmB* sp.) was attached to one of the 



cirri (see Part 2, pp. 645-649). , o°si'nn" 



Locality.-Willebrord Snellius station 253*; north of wes tern C eram ( a . 2 51 00 

 S Ion. 12S°48'00" E.) ; about 200 meters; April 28, 1930 [A. H. Clark, 936] (1, KM.). 

 ' H^.-This species is known only from the single specimen dredged by the 

 Willebrord Snellius in 1930 and described in 1936. 



STENOMETRA QUINQUECOSTATA (P. H. Carpenter) 



Plate 1, FtGURES 2, 3; Plate 2, Figures 4, 6, 7 

 [See also vol. 1, Pt. 1, fig, 9, p. 65, 260, p. 259, 485, p. 365; p, 2, fig , 820-822, p. 302, p, 2, figs. 070, 



Antedon ^ecosiata P. H. Carpekter CHalUn g er Iteports ^^^S^^iS. 

 (description; Ckbjr^- 192) ^^ p ^^VS[C^o^a]^^a).-HAMA^ 

 Acad. German., vol. 58, No. 1, 1801, p. ii ^""'! * „ 1907 1581 (listed).— A. H. 



Bronn's Klassen und Ordnunger id. .Tier -Reich ^^J*™^ Mem. Mus. Comp. 

 Clark, Crinoids of the Indian Ocean 1012 p. 34 laenti y, ( cen trodorsal and 



Zool., vol. 27, No. 4, 1012, p. 300 (in Spimfera group, history), ng. 8, p. ao 

 radial articular faces). . p ,. vol 50 P t 3, 1007, p. 360 (listed). 



Stenometra quinquecostata A. H. Clark rroc. (compared with 5. dorsata [diadema]); 



Vid. Medd. Naturh. Foren. **^™' ™£™S 8 . dorsa <a tfiptati and with S. 

 Proc. U. S. Nat. Mus., vol. 30, 1011, p. 5o4 (compa (synonymy; locality); 



cW^a) ; Crinoids of the Indian Ocean, 1012, p. 4 ^ (.denUty), £ ^^ ^ ^ 



Smithsonian Misc. Coll., vol. 61, No. 15, l»i* P- * v ran } 157 



British Museum) ; Unstalked crinoids of the S.^a-Exped., 1018, p. 



