llil' in [ l l.l IN S2, r\i i i;|) STATES NATIONAL MUSEUM 



Danish Expedition bo the K.u Islands, station 54; Dr. Th. Mortonsen; 85 meters; 

 sand and cor.il ; May 9, 1 922 (8). 



Danish Expedition bo the Cei [elands, station 57; Dr. Th. Mortensen; 85 meters; 

 Band and coral; May 9, 1922 (2). 



Siboga station 289; off the southern coast of Timor (lat. 9°00'18" S., long. 

 L26 Jl':;n" i: |; L12 meters; mud, sand, and shells; January 20, 1900 [A. H. Clark, 

 L912; 191S] (3, Amsterdam Mus.). 



Siboga station 294; off southwestern Timor (lat. 10°12'12" S., long. 124°27'18" 

 E.); 73 motors; soft mud with very fine sand; January 23, 1900 [A. H. Clark, 1918] (55, 

 U. S. X. M., E. 475; Amsterdam Mus.). 



WUlebrord Snelkua station 60*; lat. 6°58'00" X., long. 121°52'30" E.; 72-80 

 meters; September 5, 1929 (1,L. M.). 



Geographical range. — From the Philippines to the Kei and Lesser Sunda Islands. 



Batkymetrical range.— -From 73 to 112 meters. 



History. — This species was first described by me in 1912 from three specimens 

 from Siboga station 289. It was redescribed and figured in 1918, when it was recorded 

 also from Siboga station 294 and Albatross station 5355. In 1936 it was recorded from 

 U'illebrord Snellius station 60*. 



EUDIOCBINUS EOA. Bp. nov. 



Diagnostic features. — The slender and strongly recurved cirri composed of only 

 11 or 12 segments, of which the longest are about two and one-half times as long as 

 the median width and the antepenultimate is half again as long as broad, distinguish 

 this species from all the others in the genus. 



Description. — The centrodorsal is thin discoidal with a broad flat dorsal pole. 

 The cirrus sockets are arranged in a single fairly regular marginal row. 



The cirri are XV, 11-12, very slender, strongly recurved, and composed of seg- 

 ments all of which except the basal are longer than broad. The first segment is about 

 t wife as broad as long, the second is about twice as long as the median width, the 

 third-sixth or -seventh are about two and one-half times as long as the median width, 

 and those following slowly decrease in length so that the antepenultimate is half 

 again as long as broad and the penultimate is slightly longer than broad. The 

 second segment is rather strongly constricted centrally, the third much less so, and 

 on those following the constriction is still less, finally disappearing at about the middle 

 of the cirri. The opposing spine is represented by a minute terminal tubercle. The 

 terminal claw is somewhat longer than the penultimate segment, and is rather strongly 

 and evenly curved. The IBr series are rather deeply constricted at the syzygial line. 

 In the earlier portion of the arms the central part of the ends of the brachials is slightly 

 thickened, but this disappears after the basal third. 



P c is short, stout, strongly prismatic, and tapers rapidly and evenly to the tip ; 

 it is 2.5 mm. long and is composed of eight segments. Pi resembles P c . P E is 4 mm. 

 long, about as stout basally as P c , but tapers more gradually to a slender tip. 



Locality.— Dr. Th. Mortensen's Pacific Expedition, 1914-1916; off Jolo (Sulu); 

 about 46 meters; sand and coral; March 19, 1914 (1, C. M.). 



Remarks. — As yet this species is known only from the type specimen. 



