384 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Dr. Sixten Bock's Expedition to Japan station 34; Sagami Bay, off Okinose; 731 

 meters; June 26, 1914 [Gislen, 1922]. 



Dr. Sixten Bock's Expedition to Japan station 35; Sagami Bay, off Okinose; 731 

 meters; June 28, 1914 [Gisle"n, 1922]. 



Dr. Sixten Bock's Expedition to Japan station 36; Sagami Bay, off Misaki; 366 

 meters [Gisle"n, 1922]. 



Albatross station 5068; Suruga Gulf; Ose Saki bearing S. 18 E., 0.9 mile distant 

 (lat. 3502'25" N., long. 13846'55" E.); 141-239 meters; temperature 17.22 C.; 

 black sand and broken shells; October 15, 1906 (5, U.S.N.M., 35518). 



Albatross station 5069; Suruga Gulf; Ose Saki bearing S. 630' E., 1.7 miles dis- 

 tant (lat. 3503'10" N., long. 13847'00" E.); 197-239 meters; temperature 13.22 C.; 

 mud, sand, and broken shells; October 15, 1906 (1, U.S.N.M., 35515). 



Albatross station 5070; Suruga Gulf; Ose Saki bearing S. 8 W., 1.8 miles distant 

 (lat. 3503'25" N., long. 13847'40" E.); 197 meters; temperature 14.22 C.; mud, 

 sand, and broken shells; October 15, 1906 (1, U.S.N.M., 35517). 



Suruga Gulf; Albatross (1, U.S.N.M., 35514). 



Albaitross station 5090 ; Uraga Straits, at the entrance to Tokyo Gulf ; Joga Shima 

 light bearing N. 6 W., 4.4 miles distant (lat. 3503'50" N., long. 13937'30" E.); 

 365 meters; temperature 8.67 C.; pebbles and broken shells; October 26, 1906 (3, 

 U.S.N.M., 35512, 35516; M. C. Z., 342). 



Geographical range. Southern Japan from the Eastern Sea to Tokyo Gulf. 



Bathymetrical range. From 155 (?115) to 365 meters; the average of 9 records is 

 202 meters. 



Doctor Bock's depths are not considered in the preceding statement as they 

 represent the length of wire out, not the actual depths at which the animals were 

 living. 



Thermal range. From 8.67 C. to 17.22 C. ; the average of five records is 13.84 C. 



History. This species was first mentioned under the name Antedon discoidea by 

 Prof. Jesse Francis McClendon in a paper on myzostomes published in 1906. The 

 name was given Professor McClendon by Dr. Hubert Lyman Clark, who at the time 

 was engaged in working on the crinoids collected in the waters of southern Japan 

 by the Albatross in 1900 and 1902. Later Dr. Clark was so very kind as to turn all 

 these Japanese crinoids, together with his notes on them, over to me so that I might 

 have them as a supplement to the much larger collection that I made in the same 

 area in 1906. 



In 1907 I described this species under the name of Antedon flavopurpurea from 

 a specimen from Albatross station 4935, transferring the species to the new genus 

 Calometra later in the same year. In 1908 I recorded eight specimens from three 

 localities in Sagami Bay that had been dredged by Alan Owston in his yacht the 

 Golden Hind. Mr. Owston had showed me these specimens when I visited his store 

 in Yokohama in 1906, and they were subsequently purchased by Frank Springer and 

 deposited in the U. S. National Museum. In another paper published in 1908 I 

 compared this species with a new species, Calometra (Pectinometra) carduum. In my 

 memoir on the crinoids of the Indian Ocean published in 1912 I transferred flavo- 

 purpurea to the new genus Pectinometra and gave the synonymy and range, and in 

 1915 I discussed the range of Pectinometra flavopurpurea and its significance. In 



