568 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The new Indian species referred to was described as Mariametra margaritifera 

 ( = vicaria). 



In July 1912, 1 described Mariametra tenuipes and M. tuberculata from the Siboga 

 collection and compared the latter with M. delicatissima ( = Antedon delicatissima A. 

 H. Clark, 1907). 



In my memoir on the crinoids of the Indian Ocean published later in 1912 I 

 redescribed Bell's Antedon vicaria under Mariametra vicaria. I also redescribed and 

 figured my own Mariametra margaritifera and listed M. subcarinata, giving the 

 synonymy and range. 



In 1913 I established the family Mariametridae and as the nominal species under 

 the genus Mariametra listed delicatissima, margaritifera, subcarinata, tenuipes, tuber- 

 culata, and vicaria. 



KEY TO THE SPECIES IN THE GENUS MARIAMETRA 



a*. About 40 arms 60-80 mm. long; no median dark stripe on division series or arms; lateral orna- 

 mentation on the division series fine and more or less obscure; P 3 and P 4 similar and of the same 

 length, 10-15 mm. long, with 16-20 segments, stouter and stiffer than the other proximal 

 pinnules and standing out prominently from them; cirri 15-22 mm. long, with 30-40 (usually 

 30-35) segments (southern Japan from Oki Islands in Sea of Japan to Tokyo Bay, and south- 

 ward to Formosa [Taiwan] channel; 40-108 meters) subcarinata (p. 568) 



a 2 . Not more than 30 arms; a narrow median dark stripe on division series or arms or both; orna- 

 mentation more conspicuous; P 4 shorter than Pj. 



b 1 . Outer cirrus segments broader than long, or at least not longer than broad, with long sharp 

 dorsal spines; 18-30 arms 35-65 mm. long; cirri XXI-XXIII, 29-36, 15-23 mm. long (from 

 Macclesfield Bank south to Amboina, the Kei Islands, and Sapeh Strait, and westward to 



Mergui Archipelago; 55 [?36]-100 meters) . vicaria (p. 573) 



6 2 . Outer cirrus segments longer than broad, though on some cirri a few of the outermost may be 



about as long as broad, simply carinate dorsally, or with slight tubercles or blunt spines. 

 c 1 . About 40 cirrus segments; about 30 arms 70 mm. long; P 3 much the longest pinnule, 11 mm. 

 long with about 20 elongated cylindrical segments (Linschoten Islands, off southwestern 



Japan; 153 meters) delicatissima (p. 579) 



c 2 . Not more than 30 cirrus segments. 



d l . Cirri about one-fourth length of arms, with longest segments twice as long as broad; 

 sides of ossicles of division series coarsely tubercular; a faint median line of pinkish on 

 proximal half of arms, but none on division series (off western Flores; 69-91 meters) 



tuberculata (p. 580) 



d?. Cirri approximately half arm length, with longest segments about three times as long as 

 median width; sides of ossicles of division series with irregular and closely crowded 

 short blunt spines; a median line of dark purple on division series and arms (off Timor; 

 73 meters) tenuipes (p. 582) 



MARIAMETRA SUBCARINATA (A. H. Clark) 



PLATE 60, FIGURES 276-278 



|Ree also vol. l,pt. 1, fig. 260 (centrodorsal) , p. 255; fig. 343 (cirrus), p. 287; fig. 476 (radial pentagon) , 

 p. 361; pt. 2, figs. 47, 48 (radial pentagon), p. 26; fig. 247 (arm), p. 199; fig. 684 (arm base), 

 p. 338; figs. 722, 723 (disk), p. 346.] 



Himerometra subcarinata A. H. CLARK, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 237 (description; 



Albatross station 4880), p. 308 (Tokyo Gulf; Sagami Bay), p. 523 (listed); Proc. Biol. Soc. 



Washington, vol. 22, 1909, p. 144 (type of Mariametra). 

 Dichrometra subcarinata A. H. CLARK, Proc. Biol. Soc. Washington, vol. 22. 1909, p. 13 (listed). 



