214 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Genus CRASPEDOMETRA A. H. Clark 



>n (part) P. 0. Carpenter, Journ. Linn. Soc. (Zool.), vol. 16, 1882, p. 509, and following 

 authors. 

 Himerometra (part) A. n. Ci.auk, Smithsonian Misc. Coll., vol. 50, 1907, p. 356. 



sdometra A. 11. Clabx, Proo. Biol. Soc. Washington, vol. 22, 1909, p. 8 (diagnosis; genotype 

 Antrim acuticirra P. n. Carpenter, 1882), p. 175 (referred to the Ilimerometrinae) ; Mem. 

 Australian Mub., vol. 4, mil, pp. 731, 732 (in keys), p. 735 (1 species in Australia), p. 763 

 (original reference; characters; range); Crinoids of the Indian Ocean, 1912, p. 10 (does not 

 extend beyond Hongkong; absent from' Japan; reason), p. 11 (occurs both east and west of 

 Ceylon), p. 12 7 (rcpresented*in Rcd'Sea'region and in southeast African region), p. 21 (distri- 

 bution in detail), p. 56 (in key), p. 117 (original reference; type). — F. W. Clarke and Wheeler, 

 U. S. Gcol. Surv. Prof. Pap. 90-L, 1915, p. 195 (inorganic constituents of the skeleton); Prof. 

 Pap. 102, 1917, pp. 23ff. J (same). — A. H. Clark, Unstalked crinoids of the Siboga-Exped., 

 1918, p. 72 (in key; range). — F. W. Clarke and Wheeler, U. S. Geol. Surv. Prof. Pap. 124, 

 1' '.'.', p. 20 (inorganic constituents of the skeleton). — Gisl£n, Kungl. Fysiogr. Sfillsk. Handl., 

 new ser., vol. 45, No. 11, 1934, p. 44. 



Diagnosis. — A genus of Himeromotridae in which the cirri are long, with 40-60 

 segnu irly straight or slightly curved, tapering gradually from a stout proximal 



portion to a sharply pointed tip, with the distal segments much longer than broad 

 and without dorsal processes; there is no opposing spine, and the terminal claw is 

 nearly straight. P D is shortor and more slender than Pi, which in turn is shorter and 

 moro slondor than P 2 . The IIIBr series are usually developed only on the inner side 

 of tho IIBr series, and are 2; if they are developed both interiorly and exteriorly 

 they are commonly 2 interiorly and 4(3+4) exteriorly. 



Geographical range. — Prom tbe Gulf of Martaban and the Andaman Islands to 

 Amboina, and northward to the Philippine Islands. 



I !< it It y metrical range. — Littoral and sublittoral; tho only recorded depth is 33 

 meters. 



Remarks.— Wliilo tho singlo species included in this genus is, because of the long, 

 nourly straight, gradually tapering, sharp pointed and smooth cirri, strikingly different 

 in its general appearance from tho species of Heterometra it scarcely deserves to bo 

 separated from thorn. It agrees with them in all its other characters. Moreover, 

 slight dorsal tuborclos are present in one of tho known specimens on the outer cirrus 

 segments, while in some of tho species of Heterometra those aro so slight as to bo barely 

 noticeable. 



/ 2 tory. — The single species now included in this genus was originally described 

 in 1882 in the genus Antedon under four different names. With my first revision of 

 the old genus Antedon in 1907 this species was placed in the new genus Himerometra. 

 In 1909 the gonus Craspedometra was established with Antedon acuticirra P. H. 

 Carpenter, 1882, as the genotype, and the nominal species listed as referable to it 

 were Craspedometra acuticirra, C. australis, C. bipartipinna, and C. ludovici, all of 

 which represent in reality the same form. 



In 1911 I describod two new species undor the names Craspedometra ater and 



C. madagascarensis, and in 1912 in my monograph of tho crinoids of the Indian Ocean 



, gave tho name Craspedometra am boinae to the specimens from Amboina 



referred by Hartlaub in! 1891 to Antedon ludovici, and referred Carpenter's Antedon 



pe to tho gonus Craspedometra. In 1913 Dr. A. Reichonsporger usod the names 

 Craspedometra amboinae and C. anceps and suggested that the specimen he referred 



