56 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Bathymetrical range From 245 to 621 meters; the average of seven records is 397 

 meters. 



Thermal range. One record, 10.2 C. 



History. This species was originally described under the name of Cosmiometra 

 philippinensis from a single specimen from Albatross station 5523. I wrote that it is 

 most closely related to C. komachi (=aster) from southern Japan, but the division series 

 and oblong lower brachials are smooth, without the broadly everted and roughened edges 

 and the rounded median linear tubercles of the latter, and the bare midradial areas on 

 the centrodorsal are much broader. I said that both these species are related to C. 

 woodmasoni which, however, appears to differ in the greater compression of the division 

 series and consequent apparent narrowness of the lower part of the animal, and in the 

 shortness of its cirri, which are said to have 35-45 segments, though figured with 35 

 (fig. 1) and 50 (figs. 2, 3). Three additional specimens from Albatross station 5424 were 

 recorded, and notes on these were given. 



In 1912 I described as a new species Cosmiometra helene from Siboga station 253. 

 In my memoir on the unstalked crinoids of the Siboga expedition published in 1918 I 

 placed C. helene in the synonymy of C. philippinensis which I recorded from stations 95, 

 253, and 254, giving notes on the specimens. 



COSMIOMETRA CONIFERA (Harllanb) 



PLATE 3, FIGURES 10, 11; PLATE 4, FIGTJRE 15 

 [See also vol. 1, pt. 1, fig. 366, p. 297; pt. 2, fig. 213, p. 155; figs. 843-848, p. 405.) 



Anledon com/era HARTLAUB, Nachr. Ges. Gottingen, May 1890, pp. 169, 173 (description; Japan); 

 Nova Acta Acad. German., vol. 58, No. 1, 1891, p. 76 (detailed description and comparisons; 

 Japan, deep water), pi. 4, fig. 46; pi. 5, figs. 51, 56. HAMANN, Bronn's Klassen und Ordnungen des 

 Tier-Reichs, vol. 2, Abt. 3, 1907, p. 1581 (listed). A. H. CLARK, Proc. U. S. Nat. Mus., vol. 33, 

 1907, p. 145 (considered as a synonym of A. quinquecostata) ; vol. 34, 1908, p. 466 (listed); vol. 43, 

 1912, p. 384 (= Cosmiometra conifera); Crinoids of the Indian Ocean, 1912, p. 37 (identity). 

 HARTLAUB, Mem. Mus. Comp. Zool., vol. 27, No. 4, 1912, p. 309 (systematic position; history). 



Stenometra conifera A. H. CLARK, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 15 (listed). 



Cosmiometra conifera A. H. CLARK, Vid. Medd. Naturhist. Foren. K0benhavn, 1909, p. 186 (allied to 

 C. crassicirra); Proc. U. S. Nat. Mus., vol. 43, 1912, p. 384 (identity), p. 404 (Japan); Crinoids 

 of the Indian Ocean, 1912, p. 37 (identity), p. 214 (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. 154 (in key; range; references). GISLEN, 

 Kungl. Fysiograf. Sallsk. Handl., new ser., vol. 45, No. 11, 1934, p. 20. 



Diagnostic features. A species with 20 arms in which the elements of the division 

 series and first two brachials are entirely smooth dorsally; and the cirri, which are 

 arranged in 10 definite columns on a conical centrodorsal, are long and slender, slightly 

 more than half as long as the arms, with about 70 segments. The arms are about 70 mm. 

 long, and the cirri are 45 mm. long. 



Description. The centrodorsal is conical with a moderately broad stellate base the 

 five angles of which are interradial and are produced ventrally. There are about 40 

 cirrus sockets which are arranged in 10 columns of 4 each. The columns are separated 

 by rather low radial and interradial ridges of which the interradial run to the angles of 

 the pentagonal base. The 10 ridges are of equal height and size, but the radial are 

 slightly broadened at the lower end. 



