76 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



second is twice as long as broad, and the third to fifth, which are the longest, are from 

 three to three and a half times as long as broad. The segments are somewhat con- 

 stricted centrally and the ends, especially the distal, are enlarged. 



The radials are just visible beyond the edge of the centrodorsal, or concealed except 

 in the interradial angles. The IBr! are very short, from four to six times as broad as 

 long, more or less concealed in the median line by the posterior process from the axillary, 

 laterally free, and with a small lateral tubercle on either side. The IBr 2 (axillaries) are 

 rhombic, from as long as broad to one third broader than long, with all the sides, 

 especially the two anterior, concave, and a strong posterior process which incises the 

 IBr z and rises to a prominent synarthrial tubercle with it. 



The 10 arms are from 20 to 45 mm, in length. The first brachials have a short 

 inner and a long outer side and are deeply incised by the posterior projection of the 

 second brachials, which are irregularly quadrate in shape, with the two proximal sides 

 very concave, and rise to a prominent synarthrial tubercle with the first. The first 

 syzygial pair (composed of the third and fourth brachials) is about as long as broad. 

 The following brachials are roughly oblong, at first broader than long, but becoming 

 wedge-shaped and longer than broad after the tenth and elongate distally. 



Syzygies occur between brachials 3+4, 9 + 10, 14 + 15 (exceptionally 16 + 17) 

 and distally at intervals of 3 (exceptionally 4) muscular articulations. 



The disk is 5 mm. in diameter. 



PI is from 2.2 to 3.5 mm. long with 7 to 10 segments, of which the first two are 

 about as long as broad and the remainder are much elongated. P 2 is similar to PI and 

 is composed of the same number of segments, but it is slightly shorter. P 3 is 

 from 2.9 to 5 mm. long with 9 to 13 segments. P 4 is 4.5 mm. long (in the largest speci- 

 men recorded) with 10 segments, and bears a gonad. The distal pinnules are from 4 to 

 6.5 mm. long, very slender, composed of 15 to 18 segments, all but the first two of 

 which are greatly elongated. 



The color in life is light yellowish brown with broad bands of darker yellow brown 

 on the arms; or yellowish white with large transverse brownish red blotches. 



Notes. The preceding description is based upon all the known specimens of this 

 species. 



In the type specimen the cirri are about XX, 12-14, 8 mm. long; the arms are 

 23 mm. long; P\ is 2.5 mm. long, with 7 segments; P 2 is similar, but very slightly shorter; 

 P 3 is 2.9 mm. long, with 9 segments. 



Localities. Albatross station 4876; in the eastern channel of the Korean Straits, 

 near the Oki Islands; Oki Shima bearing S. 29 W., 5.3 miles distant (lat. 3420' N., 

 long. 13010' E.); 108 meters; temperature 16. 72 C.; fine gray sand and broken shells ; 

 August 2, 1906 [A. H. Clark, 1907, 1918] (1, U.S.N.M., 22658). Type locality. 



Dr. Sixten Bock's station 35; Sagami Bay, off Okinose; 728 meters; June 28, 1914 

 [Gislen, 1922]. 



Dr. Sixten Bock's station 37; off Okinose; 728 meters; July 8, 1914 [Gislen, 1922]. 



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



Bathymetrical range. From 108 to 728 meters. 



Thermal range. One record, 16.72 C. 



History. This species was described in 1907 from a single specimen dredged by the 

 Albatross in 1906 in the Korean Straits. It was again found in Sagami Bay by Dr. 

 Sixten Bock in 1914, his specimens being discussed by Dr. T. Gislen in 1922. 



