148 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



479 meters; bottom temperature 11.7 C.; green mud; August 5, 1909 [A. H. Clark, 

 1911, 1912, 1915, 1918] (2, U.S.N.M., 35574). 



Albatross station 5536; between Negros and Siquijor; Apo Island (C.) bearing S. 

 26 W., 11.8 miles distant (lat. 915'45" N., long. 12322'00" E.); 510 meters; bottom 

 temperature 11.9 C.; green mud; August 19, 1909 (1, U.S.N.M., 35572). 



Albatross station 5280; China Sea, off southern Luzon; Malavatuan Island (N.) 

 bearing S. 60 W., 6.1 miles distant (lat. 1355'20" N., long. 12025'55" E.); 353 

 meters; bottom temperature 9.8 C.; gray sand; July 17, 1908 [A. H. Clark, 1911, 1912, 

 1915, 1918] (1, U.S.N.M., 35575). 



Albatross station 5116; Balayan Bay; Sombrero Island bearing N. 69 E., 2.5 miles 

 distant (lat. 1341'00" N., long. 12047'05" E.); 366 meters; bottom temperature 

 10.1 C.; January 20, 1908 [A. H. Clark, 1909 (as Orotalometra eupedata), 1911, 1912, 

 1915, 1918] (1, U.S.N.M., 35576). 



Geographical range. From the Malay Archipelago northward to Luzon, Philip- 

 pine Islands. 



Bathymetrical range. From 55 to 510 meters; the average of 9 records is 339 

 meters. 



Thermal range. From 9.8 to 12.4 C.; the average of 7 records is 11.4 C. 



History. A supposed young specimen of Crotalometra eupedata recorded on May 

 13, 1909, from Albatross station 5116 proved to belong to this species which was described 

 on June 19, 1909, under the name of Crotalometra annandalei from two specimens 

 dredged by the Koyal Indian Marine Survey steamer Investigator in the Malay Archi- 

 pelago in 30 fathoms. In 1911 I recorded Thalassometra annandalei from Albatross 

 stations 5280, 5367, 5503, 5504, 5506, and 5536, giving notes on the specimens, and 

 redetermined the small 11-armed specimen from station 5116. In my description of 

 Thalassometra (Oceanometra) magna published in 1912 I compared it with Thalassometra 

 annandalei. In my memoir on the crinoids of the Indian Ocean published later in 

 1912 I redescribed and figured Thalassometra annandalei and gave the synonymy and 

 range. In my memoir on the crinoids of the Antarctic published in 1915 I compared 

 the characteristic features of Anthometra adriani with corresponding features in Thalas- 

 sometra annandalei. In 1916 I first listed this species as Oceanometra annandalei. In 

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

 included annandalei in the key to the species of Oceanometra and gave the synonymy 

 and range. 



Prof. Torsten Gislen in 1924 and 1934 discussed various features in the structure 

 of Oceanometra annandalei. 



Genus LEILAMETRA A. H. Clark 



Leilametra A. H. CLARK, Ann. Mag. Nat. Hist., ser. 10, vol. 10, No. 58, October 1932, p. 379 (diagnosis; 

 genotype L. necopinata, sp. nov.). 



Diagnosis. A genus of Thalassometrinae including species with 10 arms in which 

 the elements of the division series and lower brachials have spinous borders and the 

 brachials beyond the proximal have a spinous dorsal surface and very spinous distal 

 edges; the cirri are very long, with up to 83 segments, slender, and nearly straight, being 

 only slightly recurved distally, composed of segments with produced and spinous distal 

 ends, but broadly rounded dorsally instead of carinate, the penultimate without an 



