174 1UI.LETIN 82, UNITED STATES NATIONAL MUSEUM 



One of the specimens from Siboga station 294 may be described as follows: The 

 oentrodoraa] is discoidal, with the cirrus sockets arranged in two rows. The bare 

 dorsal pole is 2.5 mm. in diameter. The cirri are XXI, 18, 12 mm. long, and compara- 

 ti\ rlv alender. The segments increase in length to the fourth-sixth, which are about 

 t\\ ice as long as the proximal width, and then decrease in length so that the distalmost 

 Beven or eight are about as long as broad. The longer segments are centrally con- 

 stricted with widely llaring distal ends. The distal edge of the radials and the proxi- 

 mal border of the 113^ are slightly thickened and everted, and there is a slight tubercle 

 in the middle of the latter. The distal edge of the IBr series is everted, the middle 

 fourth being thickened into a transversely elongate tubercle. The arms are about 50 

 mm. long. The central half of the distal border of the proximal oblong brachials is 

 everted and spinous, and the distal edgo of the following brachials is slightly produced 

 and finely spinous. The lateral borders of the IBr series are finely dentate. P c is 

 5 nun. long and is composed of 12 segments. P, is 7.5 mm. long with 15 segments. 

 P a is 12 mm. long with 16— IS segments, which at first are short, becoming about as long 

 as broad on the fourth, twice as long as broad on the eighth or ninth, and slightly 

 longer terminally. The pinnule is only moderately stout. The segments overlap 

 slightly along the prismatic crest, where there is a slight development of spines on 

 their distal ends. In profile the prismatic crest is slightly notched. 



The other specimen from Siboga station 294 is similar to the one described. 



The four specimens from the Danish Expedition to the Kei Islands station 26 have 

 the arms up to 50 mm. long. 



Localities. — Investigator station 61; eastnortheast of Preparis Island, between the 

 Andamans and the delta of the Irrawadi river Gat. 14° 54'30" N., long. 93° 51'00" E.); 

 75 meters; November 30, 1889 [A. H. Clark, 1909, 1912, 1915] (6, U. S. N. M., 35133, 

 35135, 35136, 36244; I. M.). 



/ x stigator station 387; off Cape Negrais, Burma Gat. 15° 25' N., long. 93°45' E.); 

 73-90 meters; sand and coral; November 16, 1909 [A. H. Clark, 1932] (1, I. M.). 



Investigator; 8 miles west of Interview Island, Andamans; 493-82 meters [A. H. 

 Clark, 1912] (2, U. S. X. M., 35144, 35163). 



Investigator; Andaman Islands [A. H. Clark, 1912] (1, I. M.). 



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

 E.); 73 meters; soft mud with very fine sand; January 23, 1900 [A. H. Clark, 1918] (2, 

 Amsterdam Mus.). 



Danish Expedition to the Kei Islands; Dr. Th. Mortensen; station 26; about 90 

 meters; sand; April 16, 1922 (4). 



Geographical range. — From southwest of the delta of the Irrawadi river south- 

 ward and southeastward to the Lesser Sunda and the Kei Islands. 



Bathymetrical range. — According to the definite records, from 73 to 90 meters. 



History. — E-udiocrinus minor was described from a single specimen taken by the 

 Royal Indian Marine Surveying steamer Investigator in the Andaman Islands in a paper 

 published on April 17, 1909. The last paragraph of the account of this new species 

 reads: "Arms and pinnules as in Eudiocrinus ornatus, the overlapping of the brachials 

 and pmnulars being moderately marked . . ." On June 19, 1909, the detailed de- 

 scription of Eudiocrimua ornatus, based upon a single specimen from Investigator 

 station 61, appeared. This description had been written and submitted for publica- 



