A MONOGRAPH OF THE EXISTING CRINOIDS 441 



Geographical range. Known only from the Kei Islands. 



Bathymetrical range. From 90 to 256 meters. 



History. This species was first described under the name of Antedon longicirra 

 by Dr. P. H. Carpenter from a single specimen that had been dredged by the Challenger 

 near the Kei Islands in 1874. I transferred longicirra to the genus Ptilometra in 1907 

 and to the genus Asterometra in 1909. In 1910 I examined the type specimen in the 

 British Museum and published notes on it in 1913. In 1918 I recorded and gave 

 notes on another specimen of Asterometra longicirra that had been dredged at the 

 Kei Islands by the Siboga in 1899. 



ASTEROMETRA MACROPODA (A. H. Clark) 



PLATE 41, FIGURE 211 



[See also vol. 1. pt. 1, fig. 94 (lateral view), p. 155; figs. 189, 190 (centrodorsal), p. 235; fig. 268 



' (ventral view of centrodorsal), p. 259; fig. 309 (habitus), p. 267; fig. 362 (cirrus), p. 295; fig. 482 



(dorsal view of the radial pentagon), p. 363; pt. 2, figs. 69, 70 (radial pentagon), p. 43; fig. 285 



(pinnules), p. 215; figs. 517-520 (pinnule tips), p. 283; figs. 812-815 (side- and covering-plates, 



p. 385.]. 



Antedon macropoda A. H. CLARK, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 136 (description; Albatross 

 station 4935); Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 358 (type of Asterometra); Bull. 

 Mus. Comp. Zool., vol. 51, No. 8, 1908, p. 245 (same). 



Ptilometra macropoda A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 359 (listed). 



Asterometra macropoda A. H. CLARK, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 318 (Japan); Proc. 

 Biol. Soc. Washington, vol. 21, 1908, p. 229 (compared with A. lepida); Vid. Medd. Naturh. 

 Foren. K0benhavn, 1909, p. 181 (same); Proc. U. S. Nat. Mus., vol. 39, 1911, p. 546 (arms 

 compared with those of A. magnipeda) ; Crinoids of the Indian Ocean, 1912, p. 193 (synonymy; 

 locality); Journ. Washington Acad. Sci., vol. 5, No. 6, 1915, p. 215 (southern Japanese species; 

 range and its significance) ; Unstalked crinoids of the Siboga-Exped., 1918, p. 141 (in key; range) ; 

 Smithsonian Misc. Coll., vol. 72, No. 7, 1921, pi. 3, fig. 32 (proportions of the cirri), pi. 10, 

 fig. 46. GISLN, Nova Acta Reg. Soc. Sci. Upsaliensis, ser. 4, vol. 5, No. 6, 1932, p. 5 (163 

 meters), p. 6 (Kiu Shui and Goto Islands), p. 101 (station 12; detailed notes), p. ISO (listed), 

 figs. 99, 100, p. 122; Vid. Medd. Dansk Naturh. Foren., vol. S3, 1927, p. 3 (station 9; 162 meters), 

 p. 42 (station 9; notes), p. 43 (comparisons), p. 68 (listed). SIEVERTS, Neues Jahrb. Min., 

 Geol. und Pal., vol. 69, Beilage-Band, Abt. B, 1932, p. 156. 



Diagnostic features. The elements of the division series and first two brachials 

 have a low sharp median keel which may be reduced to a slightly raised median line; 

 10-12 (usually 10) arms 65-95 mm. long; cirri X-XVI, 55-130 (usually 80-90), 

 45-100 (usually 60-80) mm. long, frequently as long as or even longer than the arms. 



Description. The centrodorsal is long, columnar, becoming truncated conical 

 beyond the cirri, marked with obsolete iuterradial ridges; the apical crater bears 

 sometimes 5 large tubercles which are interradial in position, and sometimes a number 

 of small ones which are irregularly placed. The cirrus sockets are arranged in 10 

 very closely placed columns. 



The cirri are XV, 100-130, 100 mm. in length, usually somewhat longer than the 

 arms, and very stout, the width in lateral view increasing distally, then diminishing 

 again at the tip. 



The radials are somewhat over twice as broad as long, with a strong median 

 dorsal tubercle. The IBr and IIBr series have a sharp median keel. 



The 10-12 arms are 95 mm. long. 



724008 47 29 



