470 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



and the distal intersyzygial interval is 5-7 muscular articulations. PI is 4.5-5.5 

 mm. long and composed of 13-15 segments, of which the longest are two and one-half 

 times as long as broad. PZ is 5 mm. long, with 13 segments, which are up to three 

 times as long as broad. P 3 is 3 mm. long, with 10 segments. P 4 is 2-3 mm. long, 

 with 9 segments. The pinnules following become longer again. The distal pinnules 

 are 4.5 mm. long, with 15 segments. The disk is incised and is 2.5-4 mm. in diameter. 

 The color is red-brown, with the disk whitish. 



Gislen said that the specimen last described might, because of the short P 3 , be 

 considered a young individual of Lamprometra palmata. It is to be remembered, how- 

 ever, that it is not until a rather advanced stage that young individuals attain the 

 relationships between the lengths of the proximal pinnules that are characteristic of 

 fully grown individuals. For P! is first formed, then P 2 , and finally P 3 . The shortness 

 of Pj might therefore be ascribed to the youth of the individual. 



Gisl6n pointed out that the relative and absolute lengths of the proximal pinnules 

 in the specimen from Bock's station 39 are very variable. 



Localities. Hirado Strait, southwestern Japan (lat. 3310' N., long. 12918' E.); 

 73 meters [A. H. Clark, 1908, 1909, 1912, 1913, 1915, 1918] (1, C. M.). 



Dr. Th. Mortensen's Pacific Expedition 1914-1916; station 21a; Misaki, Sagami 

 Bay, Japan; about 36 meters; June 1914 [Gisle"n, 1927]. 



Dr. Sixten Bock's Expedition to Japan, 1914; station 39; Misaki, Sagami Bay, 

 Japan [Gislen, 1922, 1924]. 



Dr. Sixten Bock's Expedition to Japan, 1914; station 47; Bonin Islands, east of 

 the Channel; 146 meters; August 1, 1914 [Gislen, 1922, 1924]. 



Geographical range. Southern Japan from Hirado Strait to Sagami Bay, and the 

 Bonin Islands. 



Bathymetrical range. Littoral and down to 73 meters at least. Dr. Bock's 

 record of 146 meters refers to the length of dredging cable out, not to the actual depth. 



History. This species was originally described under the name Himerometra 

 grandis in 1908 from a specimen in the Copenhagen Museum from Hirado Strait in 

 40 fathoms. In my revision of the family Himerometridae published in 1909 grandis 

 was referred to the new genus Dichrometra, and the type specimen was listed as Dichro- 

 metra grandis later in the same year in a paper on the crinoids in the Copenhagen 

 Museum, and again in 1912 hi my memoir on the crinoids of the Indian Ocean. 



In my revision of the family Mariametridae published in 1913 grandis was trans- 

 ferred to the new genus Liparometra. As Liparometra grandis it was mentioned as a 

 southern Japanese species hi 1915, and it was inserted hi the key to the species of 

 Liparometra published hi the report on the unstalked crinoids of the Siboga Expedition 

 in 1918. 



In 1922 Dr. Torsten Gislen recorded and described specimens from Dr. Sixten 

 Bock's Expedition to Japan, 1914, stations 39 and 47, and in 1924 he discussed various 

 structural peculiarities of the species. In 1927 he recorded and gave notes upon a 

 specimen that had been obtained by Dr. Th. Mortensen hi southern Japan. 



LIPAROMETRA EEGALIS (P. H. Carpenter) 



Anledon regalis P. H. CARPENTER, Challenger Reports, Zoology, vol. 26, pt. 60, 1888, p. 237 (descrip- 

 tion; Tongatabu reefs), pi. 46. HARTLAUB, Nova Acta Acad. German., vol. 58, No. 1, 1891, 



