168 HI I 1 l.M\ B2, I MIKI) STATES NATIONAL MUSEUM 



Pandanon, near Bohol, Philippines; 56 meters [Semper, 1868; P. H. Carpenter, 

 L882, 1884, L888; Perrier, 1883, 1886; Bell, 1894; A. H. Clark, 1907, 1908, 1912]. 



A)batr08t Btation . »rth Balabac Strait; Balabac Light bearing S. 61° W., 



L6.8 mike distant (lat. s os'10" N., long. 117°19'15" E.); 80 meters; coral and sand; 

 January 5, L909 (l.U.S VM, 35979). 



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



miles distant flat. 8°06'40" N., long 117°18'45" W.); 106 meters; sand and 



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



351 W, 85143). 



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

 bearing S. 17° E., 5.5 miles distant (lat. 6°09'00" N., long. 120°58'00" E.); 53 meters; 

 coral aand} 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). 



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



WiUebrord SneUius Btation 60*; lat. 6°58'00" N., long. 121°52'30" E.; 72-80 

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



Siboga Btation '-'">7: Kei Islands, in Du-Roa Strait; down to 52 meters; coral 

 bottom; December 1 1. 1*99 [A. II. Clark, 1918] (2, Amsterdam Mus.). 



Siboga Btation 260; Cei Hands (lat. 5°36'30" S., long. 132°55'12" E.); 90 meters; 

 Band, ©oral and BhellB; December 16 and 18, 1899 [A. H. Clark, 1918] (2, U.S.N.M., 

 K. 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 :><>.">; niid-cliannel in Solor Strait (east of Flores); off Kampong 

 Menanga; L13 meters; stony bottom; February 8, 1900 [A. H. Clark, 1918] (3, 

 i - \ M., E. 417; Amsterdam Mus.). 



Siioga station 65a; Kambarugi Bay, Tanah Djampeah; 400-120 meters; pale 

 gray mud, changing to <oral bottom during the haul; May 6, 1899 [A. II. Clark, 

 1918] (2, Amsterdam Mus.). 



Geographical ranje.— 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 Philippines] i> e it appeared advisable to him to describe it as a distinct form. 



He considered tliat 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 tlie name of Ophiocrinua indwisus. 



