572 Bt 1.I.KIIN S2, UNITED STATES NATIONAL MUSEUM 



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

 broken off at the tenth brachial Following a 11 1 Br series, is also 12 mm. long. 



Localities. Albatross station 4S80; eastern channel of the Korean Strait, in the 

 vicinity of the <>ki Islands; Old Shima hearing S. 79° W., 7.5 miles distant (lat. 

 34°16'00" N., long. 130°16'00" E.); 108 meters; fine gray sand and broken shells; 

 August 2, 1906 [A. 11. 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. 33°51' N.,long. 130°03' E.); 47 meters; shells; May 18, 1914 [Gislen, 1927]. 



Korean Straits near the Goto Islands (lat. 33°10' N., long. 129°18'E.); 73 meters; 

 Captain Suensson, Septeniher 17, 1900 [A. II. Clark, 1909, 1912, 1913, 1915, 1918] 

 (3, C. M.). 



Korean Straits, off the Goto Islands (lat. 33°09' N., long. 129°18' E.); 73 meters; 

 Schonau, May 23, 1898 [A. II. Clark, 1909, 1912, 1913, 1915, 191S] (1, C. M.). 



Korean Straits, off the Goto Islands Gat, 33°00' N., long. 129°24' 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. 34°47' N., long. 138°44' 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 Gat. 35°02' N., long. 138°52' E.); 91 meters; Alan Owston, 

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

 [original No. 7016]). 



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

 [A. II. 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. 



fialliymetrical range.— From 40 to 108 meters. 



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

 carinata from a specimen dredged by the Albatross at station 4SS0. Two months later 

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

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

 yacht the (lnhh n 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 

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

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

 the genotype. 1 said that the form I had described under the name llimerometra sub- 

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



