142 mi. 1,1. TIN 82, UNITED STATES NATIONAL MUSEUM 



8.5 mm. long, with about 23 segments. P, is 9.5 mm. long, with about 30 segments. 

 Bome of the proximal cirrus segments except the first, have an insignificant flange. 

 The disk is detached. It is 9 mm. in diameter. The mouth is central, slitlike, 

 extending from the anterior interradius toward the posterior radius. The perisome 

 is naked except for insignificant granules along the ambulacral furrows. 



The specimen from Albatross station 3717 originally described under the name 

 of Zygomstra koehleri presents the following characters: The centrodorsal is a flat 

 disk. The marginal cirri are about XX, 10-15, short and rather stout. The first two 

 segments are sbort, and those following are longer than broad and somewhat constricted 

 centrally. The opposing spine is very small, and the terminal claw is short and curved. 

 The radials are just visible beyond the edge of the centrodorsal, and are free distally. 

 The lllr, are nearly three times as broad as long and are united to the low triangular 

 !Br : (axillaries) by syzygy. The IBr series are dorsally rounded and are widely 

 free laterally. The 10 arms are 45 mm. long and are composed of 65-80 brachials, 

 of which the first seven are oblong or slightly wedge-shaped, broader than long, those 

 following are wedge-shaped and as long as or longer than broad, and the distal become 

 elongate. Syzygies occur between brachials 3+4, 9 + 10 and 14 + 15, and distally at 

 intervals of four or l\\e muscular articulations. P] is long and slender, with more 

 than '20 segments, of which the basal three or four are broader than long and the 

 remainder are elongate. P a is distinctly, and often much, shorter, with fewer 

 segments. P 2 is the longest, with about 25 elongated segments. The following 

 pinnules are not much shorter but are very much more slender. The anal tube and 

 the posterior interradius are heavily plated, but the rest of the disk is almost naked. 

 The color in life was bright yellow. 



Localities.— Korean Straits, off the Goto Islands (lat. 32°20' N., long. 128°15' E.) ; 

 201 meters; bottom temperature 11.67° C; Captain Suensson, May 17, 1911 (8, 

 U.S.N.M., K. 10SS;C.M.). 



Albatross station 4933; Eastern Sea, off Kagoshima Gidf; Sata Misaki light 

 bearing N. 84° E., 8.5 miles distant (lat. 30°59'00" N., long. 130°29'50" E.); 278 

 meters; rocky bottom; August 16, 1906 (1, U.S.N.M., 35169, 36232). 



Albatross station 4934 ; Eastern Sea, off Kagoshima Gulf ; Sata Misaki light bearing 



N. 77.5° E., 7 miles distant Oat. 30°58'30" N., long. 130 o 32'00 ff E.); 188-278 meters; 



rocky bottom; August 16, 1906 [A. H. Clark, 1907, 1912, 1918] (1, U.S.N.M., 22606). 



Dr. Sixten Bock's Expedition to Japan station 5; off Kagoshima; 247 meters; 



May 13, 1914 [Gislen, 1922]. 



Dr. Th. Mortensen's Expedition to Japan station 5; off Kiu Sliiu, 9 miles W. to 

 X., X X., of Bonomisaki; 247 meters; sand and shells; May 13, 1914; presumably 

 identical with the locality just preceding [Gislen, 1927]. 



Albatross station 3704; Sagami Bay; Ose Zaki bearing S. 53° W., 2.25 miles 

 distant; 115-137 meters; volcanic sand and gravel; May 8, 1900 (1, U.S.X.M., 35134). 



Albatross station 3717; Sagami Bay; Ose Zaki bearing S. 34° E., 0.8 mde distant; 

 137-183 meters; volcanic sand, shells and rock; Mav 11, 1900 [A. H. Clark, 1907, 

 !"!_', 1918] (1, U.S.N.M, 22660). 



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



Bathymetrical range.— From 137 (?115) to 278 meters; the average of six records 

 is 196 meters. 



