106 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



following segments have slightly produced and finely spinous distal edges. The follow- 

 ing pinnules are small and weak. 



Locality. ?Coast of China; "very deep water" [A. H. Clark, 1912, 19J3, 1915, 

 1918] (1, H.M.). 



EUANTEDON POLYTES A. H. Clark 



Euantedon polytes A. H. CLARK, Temminckia, vol. 1, 1936, p. 295 (listed), pp. 315, 316 (description), 

 pi. 7, fig. 5, pi. 8, fig. 6. 



Diagnostic features. Cirri XXX, 13-14, 8 to 10 mm. long; the longest cirrus seg- 

 ments are about twice as long as broad; Pj is 11 to 15 mm. long with 17 to at least 20 

 segments. 



Description. Cirri about XXX, 13-14 (usually 13), 8 to 10 mm. in length. The 

 longest cirrus segments are about twice as long as broad; the antepenultimate is as 

 long as broad, or only very slightly longer than broad, and that preceding is only slightly 

 longer. The longest segments have a slightly concave ventral profile and a still more 

 slightly concave dorsal profile, so that their ends do not appear swollen. In lateral 

 view the cirri are half again as broad in the compressed distal portion as proximally. 

 The cirri are, in general, like those of Antedon bifida. 



The arms number 10 and are 70 to 80 mm. long. Together with the division series 

 they resemble those of E. sinensis. 



P! in the holotype is 11 mm. long, with 17 or 18 segments. In the paratype it is 

 15 mm. long, with over 19 segments. The second segment is as long as broad, the third 

 is half again as long as broad and those following gradually increase in length, so that 

 the thirteenth and succeeding segments are about four times as long as broad. The 

 segments in the proximal half are very slightly constricted centrally, but the distal 

 ends are scarcely, if at all, produced. 



P 2 is 7.5 mm. long in the holotype, with 14 segments, similar to PI but propor- 

 tionally more slender. P 3 is shorter than P 2 and resembles the succeeding pinnules. 



In the paratype P 2 is 13 mm. long, with 23 segments (probably about as many as, 

 or slightly fewer than, PI) resembling Pj but very slightly more slender and with the 

 distal segments more elongated. P 3 is 6.5 mm. long with 12 segments, about as stout 

 basally as P 2 , but tapering more rapidly. The following pinnules are similar. 



The color of one specimen is light yellow brown, mottled with lighter, and of the 

 other brown regularly banded with white, the syzygial pairs being white and the other 

 brachials brown. 



Localities. Willebrord Snellius; Tanah Djampea, south of Celebes; 2-3 meters; 

 February 21-22, 1930 [A. H. Clark, 1936] (1, Leyden Mus.). Type locality. 



Willebrord Snellius; near Koepang (Timor), East Indies; 10-15 meters; December 

 2, 1929 [A. H. Clark, 1936] (1, Leyden Mus. ?). 



Geographical range. Known only from the East Indies. 



Bathymetrical range. From 2 to 15 meters. 



Genus MASTIGOMETRA A. H. Clark 



Mastigometra A. H. CLARK, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 229 (type M. flagellifera) ; 

 vol. 22, 1909, p. 176 (referred to the Antedoninae) ; Vid. Medd. Nat. Foren. K0benhavn, 1909, 

 p. 128 (East Indian representative of Antedon), p. 190 (most closely related to Antedon; com- 

 parisons); Proc. U.S. Nat. Mus., vol. 38, 1910, p. 331 (represents Antedon in the Indian Ocean; 



