A. MONOGRAPH OF THE EXISTING CRINOID8 423 



Of the four specimens collected by the Siboga at Enkhuizen Island, one has 30 

 arms 135 mm. long and the cirri XXXV, 24-25, 30 mm. long. P, is 11 mm. long, 

 with 20 segments, very slender and delicate, with the outer segments three times as 

 long as broad. P 2 is 15 mm. long, stiff and spinelike, with 12 segments. P 8 is 14 mm. 

 long, with 11 segments, and resembles P 3 , but is slightly more slender. P 4 is 10 mm. 

 long, with 1 1 segments, and resembles P 3 . P s is 7 mm. long with 9 segments and is 

 of the same characte- as the immediately preceding pinnules. The following pinnules 

 are short. The other specimens are similar. 



Localities.- Port Galera, Mindoro, Philippines; Lawrence E. Griffin (23,M.C.Z., 

 615, 630, 690-696). 



Siboga station 99; anchorage off North Ubian, west of Jolo (Sulu), Philippines 

 (lat. 607'30" N., long. 12026'00" E.); 16-23 meters; lithothamnion bottom; June 

 28-30, 1899 [A. H. Clark, 1918] (1, Amsterdam Mus.). 



Ugi, Solomon Islands [A. H. Clark, 1912, 1918] (1, Austr. M.). 



Ternate, Moluccas [Pfeffer, 1900; A. H. Clark, 1918]. 



Anchorage near Bongao, Tawi-tawi Islands; 27 meters; Willebrord Snellius, 

 September 9, 1929 (2, L.M.). 



Near Koepang; 6-15 meters; Willebrord Snellius, December 4, 1929 (1, L.M.). 



Obi latoe; shore and reef; Willebrord Snellius, April 23-27, 1930 (1, L.M.). 



Lembeh Strait, Celebes; Willebrord Snellius, September 25, 1930 (1, L.M.). 



Amboina; Willebrord Snellius, September 17, 1930 (1, L.M.). 



Amboina; Dr. J. Brock [Hartlaub, 1890, 1891; A. H. Clark, 1907, 1909, 1911, 

 1912, 1918] (2, H.M., L.M.). 



Amboina; Professor Strubell [Reichensperger, 1913; A. H. Clark, 1918]. 



Danish Expedition to the Kei Islands; Dr. Th. Mortensen; Vatek van Toeal; 

 about 1-2 meters; rocky coast; March 27, 1922 (2). 



Siboga, Enkhuizen Island, near Batavia, Java [A. H. Clark, 1918] (4, U.S.N.M., 

 E. 469; Amsterdam Mus.). 



Geographical range. From the Philippines to the Solomon Islands and the 

 Moluccas, and westward to Java. 



Bathymetrical range. From the shoreline down to 16 (?23) meters. 



Occurrence. Hartlaub said that the commonest comatulids at Amboina seem to 

 be this species and Heterometra amboinae ("Antedon ludovici"). 



History. This species was first described as Antedon oxyacantha by Dr. Clemens 

 Hartlaub in 1890. In 1891 he redescribed and figured it, and compared it in detail 

 with related species. It was recorded by Prof. Georg Pfeffer from Ternate in 1900. 



On my establishment of the new genus Himerometra in 1907, oxyacantha was 

 included in it, but it was removed to the new genus Stephanometra in 1909. 



In 1911 I published notes on one of Hartlaub's specimens from Amboina, which 

 I had seen in the Leyden Museum, and hi 1912 I published notes on another that I 

 had examined at the Hamburg Museum. In 1912 also I described in detail a specimen 

 in the Australian Museum from Ugi in the Solomon Islands. 



Dr. August Reichensperger in 1913 described a specimen collected at Amboina 

 by Professor Strubell, and in 1918 I recorded and gave notes upon five specimens 

 collected by the Siboga at station 99 and at Enkhuizen Island. 



