18 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



In a memoir on the crinoids of the British Museum published in 1913 I gave notes 

 on three specimens from Challenger station 192 that I had examined in 1910. In my 

 report on the unstalked crinoids of the Siboga expedition published in 1918 quinque- 

 costata was included in a key to the species of Stenometra, and the range and synonymy 

 were given. In 1929 I recorded and gave notes on two specimens that had been found 

 on a cable in Rotti Strait in 100 fathoms by the Eastern and Associated Telegraph 

 Company's cable repair ship The Cable. At the same time I described in detail under 

 the name of Stenometra diplax another specimen from the same locality which is un- 

 doubtedly merely an aberrant individual of S. quinquecostata. In 1934 when recording 

 a number of species in the Raffles Museum, Singapore, collected by the cable repair 

 ship The Cable, I mentioned Stenometra diplax as one of the new species that had been 

 collected by that ship in previous years. 



In 1934 Prof. Torsten Gislen discussed the arm division of Stenometra quinque- 

 costata which he placed in his type 42, the Stephanometra spicata type. 



STENOMETRA DIADEMA (A. H. Clark) 



PLATE 2, FIGURE 5 

 [See also vol. 1, pt. 1, figs. 191, 192, p. 237; pt. 2, fig. 211, p. 152.] 



Antedon quinquecostata A. H. CLABK, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 129 (comparison, in 

 key, with A. diadema), p. 143 (comparison with A. [Parametra] oriori), p. 145 (comparison with 

 A. [Cosmiometra] aster; considered as including A. [Cosmiometra] conifera). 



Antedon diadema A. H. CLARK, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 144 (description; Albatross 

 station 4934); vol. 34, 1908, p. 468 (listed). 



Thalassometra quinquecostata A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 360 (in 

 part; listed); Proc. U. S. Nat. Mus., vol. 34, 1908, p. 310 (various localities in Sagami Bay). 



Thalassometra diadema A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 360 (listed); 

 Proc. U. S. Nat. Mus., vol. 34, 1908, p. 318 (Japan). 



Stenometra diadema A. H. CLARK, Proc. Bio]. Soc. Washington, vol. 22, 1909, p. 15 (listed) ; Crinoids 

 of the Indian Ocean, 1912, p. 210 (synonymy; locality) ; Unstalked crinoids of the Siboga-Exped., 

 1918, p. 156 (in key; range); p. 157 (synonymy). GISLEN, Nova Acta Reg. Soc. Sci. Upsaliensis, 

 ser. 4, vol. 5, No. 6, 1922, p. 118 (compared with S. dentata); Zool. Bidrag Uppsala, vol. 9, 1924, 

 p. 44; Vid. Medd. Dansk Naturh. Foren. K0benhavn, vol. 83, 1927, p. 3 (stations 7, 9; 162-198 

 meters), p. 39 (stations 7, 9; notes), p. 68 (listed), figs. 34, 35, p. 44; Kungl. Fysiogr. Sallsk. 

 Hand!., new ser., vol. 45, No. 11, 1934, p. 20. A. H. CLARK, Temminckia, vol. 1, 1936, p. 315. 



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

 (listed). 



Stenometra dorsala A. H. CLARK, Vid. Medd. Naturh. Foren. K0benhavn, 1909, p. 186 (description; 

 near Nagasaki, 170 fathoms; "Eastern Asia"; compared with S. quinquecostata and with Cosmio- 

 metra conifera); Proc. U. S. Nat. Mus., vol. 39, 1911, p. 553 (compared with S. cristata); Crinoids 

 of the Indian Ocean, 1912, p. 123 (parasitic Eulima), p. 210 (synonymy; locality); Proc. Biol. 

 Soc. Washington, vol. 26, 1913, p. 179 (range in eastern Asia); Journ. Washington Acad. Sci., 

 vol. 5, No. 6, 1915, p. 215 (southern Japanese species; range and its significance); Die Crinoiden 

 der Antarktis, 1915, p. 125 (shows characteristic features of Anthomelra adriani); Unstalked 

 crinoids of the Sifcojo-Exped., 1918, p. 157 (identity). 



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

 have the proximal and distal edges unmodified and the lateral borders smooth or prac- 

 tically so; and the crest in profile is coarsely denticulate, on the IBr! usually deeply 

 bilobate. The 15-20 (almost always 20) arms are 65-80 mm. long, and the longest 

 cirri are 38-50 mm. long with 55-78 segments. 



