524 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



are the longest, with the length four times the breadth. There is no dorsal spine. The 

 arms are broken. The length from the centrodorsal to the first syzygy is 2.2 mm. P, 

 has about 22 segments and measures 4.5 mm. in length. P 2 has 10 segments and is 2.6 

 mm. long with a small gonad on the fifth to sixth segments. P a is 4.6 mm. long and P b 

 2.2 mm. long. 



Another specimen with the centrodorsal 1.3 mm. high has the interradial cirrus- 

 free area equal to the width of half a cirrus socket. The cirri are XXXIII, six or seven 

 in each group, a third row in each radius comprising one socket only. The distance from 

 the centrodorsal to the first syzygy is 2.7 mm. P : is about 4.5 mm. long. P 2 bears 

 a gonad. 



A third specimen with the centrodorsal 1.3 mm. high has about XXX cirri, with 

 20 to 22 segments, measuring 17 to 23 mm. in length. The longest segments are three 

 to four times as long as broad. The arms are 60 mm. long. The syzygial interval is 

 two to three muscular articulations. P 2 has about 14 segments, measures 4.8 mm. and 

 has a stout gonad on the fourth to eighth segments. 



Gislen (1927) comments that the smaller specimens lack the mid-radial cirrus row. 



Localities. Investigator station 197; west of Alleppey, Travancore, southwestern 

 India Gat, 934'57" N., long. 7536'30" E.); 742 meters; temperature 8.9 C.; green 

 mud; January 20, 1895 [A. H. Clark, 1912] (2, I. M.). 



Investigator station 116; Duncan Passage, Andaman Islands (lat. 1125'05" N., 

 long. 9247'06" E.); 740 meters; temperature 8.3 C.; green mud; December 9, 1890 

 [A. H. Clark, 1912] (1, U.S.N.M., 35743). 



Investigator station 115; Duncan Passage, Andaman Islands (lat. 1131'40" N., 

 long. 9246'06" E.); 344^02 meters; temperature 13.3 C.; green mud; December 9, 

 1890 [A. H. Clark, 1909, 1912] (2, U.S.N.M., 35744; I.M.). Type locality. 



Investigator station 9; 13 miles S. by W. from North Sentinel Island, Andamans; 

 238-457 meters; February 7, 1888 [A. H. Clark, 1912] (1, I. M.). 



Investigator station 13; 7 miles SE. by S. from Ross Island, Andamans; 484 meters; 

 April 25, 1888 [A. H. Clark, 1912] (2, I. M.). 



Investigator station 223 ; northeast of the Andaman Islands, off the Gulf of Marta- 

 ban (lat. 1454'30" N., long. 9613' E.); "11 meters"; soft mud; January 26, 1897 

 [A. H. Clark, 1912] (1, U.S.N.M., 35741). 



Siboga station 178; Ceram Sea, north of Ceram (lat. 240'00" S., long. 12837'30" 

 E.) ; 835 meters; blue mud; September 2, 1899 [A. H. Clark, 1918] (1, Amsterdam M.). 



Siboga station 170; Ceram Sea, between Ceram and New Guinea (lat. 337'42" S., 

 long. 13126'24" E.); 924 meters; fine gray mud; August 25, 1899 [A. H. Clark, 1918] 

 (1, Amsterdam M.). 



Siboga station 316; Flores Sea, north of Lombok (lat. 719'24" S., long. 11649'30" 

 E.); 538 meters; fine dark brown sandy mud; February 19, 1900 [A. H. Clark, 1918] 

 (2, U.S.N.M., E. 446; Amsterdam M.). 



Siboga station 38; Flores Sea, among the Paternoster Islands (lat. 735'24" S., 

 long. 11728'36" E.); 521 meters; coral; April 1, 1899 [A. H. Clark, 1918] (1, and frag- 

 ments of another, Amsterdam M.). 



Siboga station 314 ; Flores Sea, north of Sumbava (lat. 736'00" S., long. 1 1730'48" 

 E.); 694 meters; fine sandy mud; February 17, 1900 [A. H. Clark, 1918] (1, Amsterdam 

 M.). 



