168 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Pandanon, near Bohol, Philippines; 55 meters [Semper, 1868; P. H. Carpenter, 

 1882, 1884, 1888; Perrier, 1883, 1886; Bell, 1894; A. H. Clark, 1907, 1908, 1912]. 



Albatross station 5355; north Balabac Strait; Balabac Light bearing S. 61 W., 

 16.6 miles distant (lat. 808'10" N., long. 11719'15" E.); 80 meters; coral and sand; 

 January 5, 1909 (1, U.S.N.M., 35979). 



Albatross station 5356; north Balabac Strait; Balabac Light bearing S. 64 W., 

 15.5 miles distant (lat. 806'40" N., long 11718'45" W.); 106 meters; sand and 

 shells; January 5, 1909 [A. H. Clark, 1911, 1912, 1918] (4, U.S.N.M., 35138, 35139, 

 35140, 35143). 



Albatross station 5141; in the vicinity of Jolo (Sulu), Philippines; Jolo Light 

 bearing S. 17 E., 5.5 miles distant Gat. 609'00" N., long. 12058'00" E.); 53 meters; 

 coral sand; February 15, 1908 (1, U.S.N.M., 36033). 



Dr. Th. Mortensen's Pacific Expedition 1914-1916; off Jolo; about 36 meters; 

 lithothamnion; March 17, 1914 (1); 36-55 meters; sand and coral; March 19, 1914 (1). 



Ternate (west of north central Halmahera), Moluccas [Pfeffer, 1900]. 



Willebrord Snellius station 60*; lat. 658'00" N., long. 12152'30" E.; 72-80 

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



Siboga station 257; Kei Islands, in Du-Roa Strait; down to 52 meters; coral 

 bottom; December 11, 1899 [A. H. Clark, 1918] (2, Amsterdam Mus.). 



Siboga station 260; Kei Islands (lat. 536'30" S., long. 13255'12" E.); 90 meters; 

 sand, coral and shells; December 16 and 18, 1899 [A. H. Clark, 1918] (2, U.S.N.M., 

 E. 403; Amsterdam Mus.). 



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

 90 meters; sand; April 16, 1922 (3). 



Siboga station 144; anchorage north of Salomakiee (Damar) Island; 45 meters; 

 bottom coral and lithothamnion; August 7-9, 1899 [A. H. Clark, 1918] (2, Amsterdam 

 Mus.). 



Siboga station 305; mid-channel in Solor Strait (east of Flores); off Kampong 

 Menanga; 113 meters; stony bottom; February 8, 1900 [A. H. Clark, 1918] (3, 

 U.S.N.M., E. 417; Amsterdam Mus.). 



Siboga station 65a; Kambaragi Bay, Tanah Djampeah; 400-120 meters; pale 

 gray mud, changing to coral bottom during the haul; May 6, 1899 [A. H. Clark, 

 1918] (2, Amsterdam Mus.). 



Geographical range. From the Bonin and Philippine Islands and the Macclesfield 

 Bank to the Moluccas and the Kei and Lesser Sunda Islands. 



Bathymetrical range. From 36 to 183 meters; the average of 11 definite records 

 is 82 meters. 



History. Among the many comatulids that he collected near Bohol in the 

 Philippines, Prof. C. Semper found one specimen with only five arms. At first he 

 believed it to be a young individual of some species having when fully developed 10 

 or more arms, but since it did not agree in its more significant characters with any 

 other Philippine species it appeared advisable to him to describe it as a distinct form. 

 He considered that the unique feature of the possession of only five undivided arms 

 entitled it to recognition as a representative of a distinct genus, so he described it 

 under the name of Ophiocrinus indivisus. 



