92 BULLETIN 82, XHS'ITED STATES NATIONAL MUSEtTM VOLUME 1 



Annametra A. H. Clark, U.S. Nat. Mas. Bull. 82, vol. 1, pt. 2, 1921, pp. 618, 647 648, 681, 723; 

 The Danish Ingolf-Expcd., vol. 4, No. 5, Ciinoidea, 1923, p. 41 (range), p. 52 (m key); Proc. 

 U.S. Nat. Mus., vol. 83, 1936, p. 247 (diagnosis; type species Cominia occidentalts A. H. Clark, 

 1915). 



Diagnosis. — A genus of Antodoninae iu which P3 is of the same length and 

 character as the succeedmg pinnuk>s; P, and Pj have 18-35 segments; Pi is shorter 

 tlian P., though similar to it; and the cin-i are short and stout, strongly recurved distally, 

 rcsombUng the cirri of Antcdon pdasus, with 10-19 segments. 



Type species. — Cominia occidentalis A. H. Clark, 1915. 



Geographical range. — Knovm only from southern Japan and South Africa. 



Baihymetrical range. — From the shore lino down to 47 meters. 



Remarks [by A.M.C.]. — I am doubtful whether the Japanese minuta can be con- 

 sidered as congeneric with the South African occidentalis. The former does have 

 similar short cirrus segments, but so also do two other Japanese species of the 

 Antedoninae, Andrometra psyche and Antedon (formerly Compsometra) serrata. Also, 

 in genera such as Antedon, the included species show a wide range of proportions 

 of the longest cirrus segments from one and a half times to sLx times as long as 

 broad. This character is therefore of little significance in determining the genus. 

 The rather short segments of Pi, however, may be of more importance in alljang minuta 

 and occidentalis. Those of minuta (18 in the holotype) are about half again as long as 

 wide but in occidentalis the 30 to 35 segments are unique in the Antedoninae in not 

 being longer than wide (fig. 66, p. 9-5). In some species of Antedon and Mastigometra, 

 however, the pinnule segments are little longer than they are in minuta. I also consider 

 the geographical sepai'ation of the two species to be another factor against their being 

 congeneric. 



KEY TO THE SPECIES OF ANNAMETRA 



a'. Pj and Pj with about 18 segments, the longest about half again as long as wide (southern Japan; 



24-47 meters) minuta (p. 92) 



a'. Pi and Pj with 30-35 segments, not longer th.in broad (South Africa; 0-26 meters). 



occidentalis (p. 94) 



ANNAMETRA MINUTA (A. H. Clark) 



Antedon minuta A. H. Clark, Smithsonian Misc. Coll., vol. 60, pt. 3, 1907, p. 341 (description; 

 Albatross Sta. 3725), p. 353 (listed); Bull. Mus. Comp. Zool., vol. 51, No. 8, 1908, p. 241 (relation 

 to .1. [.Andrometra] psyche). — Gisl£n, Nova Acta Reg. Soc. Sci. Upsaliensis, ser. 4, vol. 5, No. 6, 

 1922, p. 133 (cannot be synonymous with adrestine). 



Iridometra minuta A. H. Clark, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 131 (listed); Proc. 

 U.S. Nat. Mus., vol. 34, 1908, p. 218 (compared with Iridometra [Argyrometra] crispa), p. 318 

 (Japan); Crinoids of the Indian Ocean, 1912, p. 232 (.synonymy, southern Japan, 13 fms.). — 

 Gisl£n, Vid. Medd. Nat. Foren. K0benhavn, vol. 83, 1927, p. 46 (synonym of /. adrestine). 



Iridometra adrestine (part) A. II. Clark, Unstalkcd Crinoids of the Siboga-Exped., 1918, p. 212 (in 

 synonymy). 



Annametra minuta A. H. Clark, Proc. U.S. Nat. Mus., vol. 83, 1936, p. 247 (noted); John Murray 

 Exped., 193.3-34, Sci. Reports, vol. 4, No. 4, 1937, p. 105. 



Diagnostic features. — Pi and Pj have about 18 segments. The arms are about 

 30 mm. and the cirri arc about 5 mm. in length. 



This is tlic only Japanese comatulid in which the cirri are of the kind characteristic 

 of Antedon petasus. 



Description. — The centrodorsal is low hemispherical, nearly covered w'wh from 15 

 to 20 cirrus sockets which are closely crowded in from 2 to 3 alternating rows and have 

 very prominent rims. 



