808 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



Of the specimens collected by the Siboga the two from station 45 are of medium 

 size; the more nearly perfect one has the cirri 22 mm. long with 19 segments; the two 

 from station 48 are much broken; the larger individual from station 314 has the arms 

 about 120 mm. long, and the swollen ovaries appear to contain ripe eggs; the smaller 

 has the arms about 90 mm. long. 



In this species there is considerable variation in regard to the extension of the 

 first brachial beyond the rim of the centrodorsal. In most individuals the first brach- 

 ials are fairly conspicuous, but in one or two they do not show at all so that the first 

 pinnule is borne on the lowest visible brachial. The arms and cirri are long and slender 

 and the centrodorsal comparatively small, giving the species a remarkably attenuated 

 appearance. 



The specimen collected by the John Murray Expedition in the Maldive area has 

 the lower brachials rather strongly constricted centrally with prominent ends. This 

 feature also occurs in some specimens from southern Japan, though it is not so marked. 

 [NOTE BY A.M.C.] This specimen appears to have double syzygies on two of the 

 three remaining arms consisting of brachials 4 + 5+6. On the third arm they are 

 4 + 5 and 7 + 8. There are XX cirri, of which the longest segments are six times 

 as long as wide. P a has 23 segments. No distinct crests are developed on the prox- 

 imal segments of the basal pinnules. 



Localities. Investigator station 114; Andaman Sea (lat. 1321' N., long. 9327' 

 E.); 1685 meters; temperature 5.1 C.; blue mud; September 13, 1890 [Wood-Mason 

 and Alcock, 1891; A. H. Clark, 1912] (1, I.M.). 



Investigator station 331; Andaman Sea Gat. 1146'30" N., long. 9316'00" E.); 

 1040 meters; temperature 4.4 C.; March 26, 1904 [A. H. Clark, 1912] (1, U.S.N.M., 

 35940). 



Investigator station 315; south of the Andaman Islands (lat. 1006' N., long. 

 9229' E.); 1289 meters; temperature 6.7 C.; green mud; April 12, 1903 [A. H. Clark, 

 1912] (1, I.M.). 



John Murray Expedition station 135; Maldive area (lat. 437'32" N., long. 

 7235'36" E., to 429'18" N., 7223'54" E.) ; 2727 meters; at 2375 meters, temperature 

 2.31 C., salinity 34.64% ; yellow ooze over gray globigerina ooze; February 18, 1934 

 [A. H. Clark, 1936] (1, B.M.). 



Siboga station 314; Sunda Sea, north of Sumbava (lat. 736'00" S., long. 

 11730'48" E.); 694 meters; fine sandy mud; February 17, 1900 [A. H. Clark, 1918] 

 (2, U.S.N.M., E. 444 ; Amsterdam M.). 



Siboga station 45; Sunda Sea, north of Sumbava (lat. 724'00" S., long. 11S15'12" 

 E.); 794 meters; fine gray mud with some radiolarians and diatoms; March 6, 1899 

 [A. H. Clark, 1918] (2, U.S.N.M., E. 445; Amsterdam M.). 



Siboga station 48; Sunda Sea, north of Sumbava (lat. 804'42" S., long. 11844'18" 

 E.); 2060 meters; fine gray mud, partially green; March 13, 1899 [A. H. Clark, 1918] 

 (2, Amsterdam M.). 



Challenger station 205; Philippine Islands, off Luzon (lat. 1642' N., long. 11922' 

 E.); 1919 meters; temperature 2.78 C.; blue mud; November 13, 1874 [P. H. Carpen- 

 ter, 1882, 1884, 1886, 1888; Walther, 1894; Minckert, 1905; A. H. Clark, 1913] (2, 

 B.M.). Type locality. 



Albatross station 4916; Eastern Sea, about 90 miles west-southwest of Kagoshima 

 Gulf; Gwaja Shima bearing S. 37 E., 37.5 miles distant (lat. 3025'00" N., long. 



