572 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



remaining, broken off at the nineteenth segment, is 12 mm. long. The longest arm, 

 broken off at the tenth brachial following a IIIBr series, is also 12 mm. long. 



Localities. Albatross station 4880; eastern channel of the Korean Strait, in the 

 vicinity of the Oki Islands; Oki Shima bearing S. 79 W., 7.5 miles distant (lat. 

 3416'00" N., long. 13016'00" E.); 108 meters; fine gray sand and broken shells; 

 August 2, 1906 [A. H. Clark, 1908, 1909, 1912, 1913, 1915, 1918] (1, U.S.N.M., 22666). 



Dr. Th. Mortensen's Pacific Expedition, 1914-1916; station 12; off Kiu Shiu, 

 Japan (lat. 3351' N., long. 13003' E.); 47 meters; shells; May 18, 1914 [Gislen, 1927]. 



Korean Straits near the Goto Islands (lat. 3310' N., long. 12918' E.); 73 meters; 

 Captain Suensson, September 17, 1900 [A. H. Clark, 1909, 1912, 1913, 1915, 1918] 

 (3, C. M.). 



Korean Straits, off the Goto Islands (lat. 3309' N., long. 12918' E.); 73 meters; 

 Schonau, May 23, 1898 [A. H. Clark, 1909, 1912, 1913, 1915, 1918] (1, C. M.). 



Korean Straits, off the Goto Islands flat. 3300' N., long. 12924' E.); 40 meters; 

 Schonau, August 16, 1891 [A. H. Clark, 1909, 1912, 1913, 1915, 1918] (1, C. M.). 



Dr. Th. Mortensen's Pacific Expedition, 1914-1916; station 14; Nagasaki, Kiu 

 Shiu, Japan; 1914 [Gislen, 1927]. 



Sagami Bay, Japan (lat. 3447' N., long. 13844' E.); 102 meters; Alan Owston, 

 August 20, 1902 [A. H. Clark, 1908, 1909, 1912, 1913, 1915, 1918] (1, U.S.N.M., 35259 

 [original No. 7173]). 



Sagami Bay, Japan (lat. 3502' N., long. 13852' E.); 91 meters; Alan Owston, 

 August 6, 1902 [A. H. Clark. 1908, 1909, 1912, 1913, 1915, 1918] (4, U.S.N.M., 35229 

 [original No. 7016]). 



Uraga Channel, entrance to Tokyo Gulf; 55 meters; Alan Owston, May 17, 1901 

 [A. H. Clark, 1908, 1909, 1912, 1913, 1915, 1918] (2, U.S.N.M., 35228, 35250 [original 

 No. 6052]). 



Uraga Channel, entrance to Tokyo Gulf; 46 meters; Alan Owston, May 26, 1901 

 [A. H. Clark, 1908, 1909, 1912, 1913, 1915, 1918] (1, U.S.N.M., 25230 [original No. 

 6067]). 



Formosa (Taiwan) Channel; 64 meters; Captain Suensson, November 23, 1901 

 [A. H. Clark, 1909, 1912, 1913, 1915, 1918] (1, C. M.). 



No locality [A. H. Clark, 1909, 1912, 1913, 1915, 1918] (1, C. M.). 



Geographical range. Southern Japan from the Oki Islands in the Sea of Japan to 

 Tokyo Bay, and southward to the Formosa (Taiwan) Channel. 



Bathymetrical range. From 40 to 108 meters. 



History. This species was first described by me in 1908 as Himerometra sub- 

 carinata from a specimen dredged by the Albatross at station 4880. Two months later 

 I recorded and gave notes on seven specimens of Himerometra subcarinata from Sagami 

 Bay and Tokyo Gulf that had been collected by Alan Owston of Yokohama in his 

 yacht the Golden Hind. Mr. Owston's collection of crinoids had been purchased and 

 deposited in the United States National Museum by Frank Springer. 



In my revision of the family Himerometridae published in 1909, subcarinata was 

 placed in the new genus Dichrometra. Later in 1909, in a paper on new recent Indian 

 crinoids, the new genus Mariametra was established with Himerometra subcarinata as 

 the genotype. I said that the form I had described under the name Himerometra sub- 

 carinata differs markedly from all the other species hi the genus Dichrometra, where I 



