354 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



One of the specimens from Annam, as described by Gisl6n, has the centrodorsal 

 discoidal, 5.5 mm. in diameter, with the bare dorsal pole flat and 4 mm. in diameter. 

 The cirri are arranged in a partially double row. The cirri are XXI, 47-52, from 23 

 to 26 mm. long. The sixth segment is about as long as broad, those following decreas- 

 ing to about half again as broad as long. The proximal segments have a longitudinal 

 dorsal carination which after about the twenty-fifth develops into a high ridge that 

 later is transformed into a dorsal spine. The radials are visible as narrow bands, 

 broader interradially, but not separating the IBrj. The IBri are three times as broad 

 as long and are laterally united in the proximal third above the radials. The IBr, 

 (axillaries) are pentagonal, one-third again as broad as long; with the IBri they form 

 an indistinct synarthrial tubercle. The ossicles of the IBr series have no ventro- 

 lateral extensions. The IIBr series are 2. There are 19 arms about 90 mm. long, 

 composed of about 125 brachials which are rounded and inconspicuously carinate 

 distally. The distal intersyzygial interval is 3 muscular articulations. Pi is 11 mm. 

 long with 28 segments, slender and flexible beyond the first two very broad segments. 

 The longest segments are one-third again as long as broad. P2 is 16 mm. long with 

 20 segments, and is stiffened. The first two segments are short, and the distal are 

 from two to two and one-half times as long as broad with spinous distal ends. P3 is 

 20 mm. long with 23 segments, and is similar to P2. P9 is 13 mm. long with 15 seg- 

 ments. The distal pinnules are 12 or 13 mm. long. The disk is globose, completely 

 enclosed by calcareous plates, and bears five unbranched ambulacral furrows. The 

 anal cone is long and pointed. The color is white, mottled with violet; the cirri are 

 brownish, and the disk is white. 



The other specimen from Annam, which is much broken, is similar. The cirri 

 have 40-50 segments. One IIIBr 2 series is present. On some rays P2 is as short 

 as Pi (regenerated). 



Localities.- — Albatross station 4895; Eastern Sea, southwest of the Goto Islands; 

 Ose Saki light bearing N. 42° E., 4.7 miles distant (lat. 32°33'10" N., long. 128°32'10" 

 E.); 174 meters; temperature 13.28° C; green sand, broken shells, and pebbles; 

 August 9, 1906 [A. H. Clark, 1907] (1, U.S.N.M., 22621). 



Albatross station 4884; Eastern Sea, about 20 miles southwest of Nagasaki 

 entrance; Nomo Zaki bearing N. 76° E., 11.5 miles distant (lat. 32°32'00" N., long. 

 129°30'45" E.); 97 meters; temperature 16.50° C; dark gray sand and broken shells; 

 August 8, 1906 fA. H. Clark, 1907] (1, U.S.N.M., 22620). 



Nha'trang Bay, Annam; 5 meters; Dr. C. Dawydoff [Gisl6n, 1937]. 



Geographical range. — From southwestern Japan southward to Annam. 



Bathymetrical range.- — From 5 to 174 meters. 



Thermal range. — Two records, 13.28° and 16.50° C. 



History. — This species was described in 1907 as Antedon versicolor from a specimen 

 from Albatross station 4884, and on the page following as Antedon propinqua from 

 a specimen from Albatross station 4895, these two supposed species being transferred 

 to the genus Calometra later in the same year. In 1908 Calometra versicolor was 

 considered as including C. propinqua as a synonym. 



In 1912 in my monograph on the crinoids of the Indian Ocean I inadvertently 

 mentioned Pectinometra versicolor. A few pages farther on I established the genus 



