A MONOGRAPH OF THE EXISTING CRINOIDS 167 



Challenger station 192; near the Kei Islands (lat. 549'15" S., long 13214'15" 

 E.); 256 meters; blue mud; September 26, 1874 [von Graff, 1884; P. H. Carpenter, 

 1888,-Hartlaub, 1891; A. H. Clark, 1907, 1908, 1909, 1912, 1913, 1918] (I.B.M.). 



Siboga station 305; mid-channel in Solor Strait, east of Flores; off Kampong 

 Menanga; 113 meters; stony bottom; February 8, 1900 [A. H. Clark, 1918] (1, Amster- 

 dam Mus.). 



Rotti Strait, from the Banjuwangi-Darwin No. 2 cable; 183 meters; cable repair 

 ship Cable, Eastern and Associated Telegraph Co. [A. H. Clark, 1929] (3, B.M.) 



Investigator; ?Kurrachi [A. H. Clark, 1912] (2, U.S.N.M., 35353, 35357). 



Investigator station 291; Straits of Ormuz, entrance to the Persian Gulf (lat. 

 2622'00" N., long. 5610'00" E.) ; 88-90 meters; mud; November 1, 1901 [A. H. Clark, 

 1909, 1912] (1, I.M.). 



Doubtful locality. Albatross station 4905; Eastern Sea, between 10 and 20 miles 

 southwest of the Koshika Islands; Tsurikake Saki light bearing S. 85 E., 18.5 miles 

 distant (lat. 31 39'00" N., long. 12919'00" E.); 674 meters; bottom temperature 

 6.33 C.; August 11, 1906 (1 calyx). 



The same net was used in this dredge haul that was used at the preceding station 

 (4904) , and it is probable that this small fragment was overlooked in cleaning the net 

 after its use at that station on the preceding day 



Geographical range. Southern Japan from Tokyo Bay to the Korean Straits, 

 the Bonin and Riu Kiu Islands, southward to the Philippine, Kei, and Lesser Sunda 

 Islands, and westward to the Persian Gulf. 



Bathymetrical range. From 22 (?15) down to 329 (?731) meters. Most of the 

 records are from depths between 90 and 200 meters. Young specimens have been 

 taken swimming at the surface. 



Thermal range. From 11.61 to 23.78 C. The average of 14 records is 15.57 C. 



History. This species was first mentioned by Dr. P. H. Carpenter in 1881 as a 

 species of Antedon dredged by the Challenger in which PI is present as usual but P a 

 is absent, though P 2 and the succeeding pinnules are perfectly normal. 



Under the manuscript name of Antedon manca it was mentioned by Prof. Ludwig 

 von Graff as a host for myzostomes in 1884. 



In the Challenger report on the comatulids published in 1888 Carpenter described 

 in detail and figured Antedon manca and A. disciformis. 



In 1891 Dr. Clemens Hartlaub inserted manca and disciformis in his key to the 

 species of the Palmata group, using the differential characters employed by Carpenter 

 hi his key in 1888. Hartlaub also compared both manca and disciformis with his new 

 species Antedon (Petasometra) clarae. Hartlaub in 1895 mentioned certain features 

 of the radial articular faces, as described and figured by Carpenter, in comparison 

 with those of a new species, Antedon (Florometra) tanneri. 



To my description of Antedon (Neometra) multicolor published in 1907 I appended 

 a note on the colors of various species of comatulids, among them Antedon manca. 

 My idea of Antedon manca was based upon a very large number of specimens which 

 I had collected in the previous year while serving as acting naturalist on the Albatross. 

 In parentheses after Antedon manca I included A. disciformis and A. clarae as syno- 

 nyms. In a paper including diagnoses of new genera of comatulids published in 

 1907, under the genus Heliometra, I said that the extraordinary Cyllometra manca 



