A MONOGRAPH OF THE EXISTING CRINOIDS 97 



Albatross station 5253; Gulf of Davao, Philippines; Linao Point bearing N. 22° 

 E., 1.5 miles distant (lat. 7° 04' 48" N., long. 125° 39' 38" E.); 51 naeters; coral; May 

 18, 1908 [A. H. Clark, 1909] (2, U.S.N. M., 34492). PI. 2, fig. 2. 



Albatross station 5356; North Balabac Strait, Philippine Islands; Ealabac Light 

 bearing S. 64° W., 15.5 miles distant (lat. 8° 06' 40" N., long. 117° 18' 45" E.); 

 106 meters; sand and shells; January 5, 1909 [A. H. Clark, 1911] (1 U.S.N.M., 34493). 



Albatross station 5413; between Cebu and Bohol, Philippines; Lauis Point Light 

 bearing N., 68° W., 10 miles distant (lat. 10° 10' 35" N., long. 124° 03' 15" E.); 

 77 meters; March 24, 1909 [A. H. Clark, 1911] (1 U.S.N.M., 34494). 



Bohol, Philippines; Prof. C. Semper [Ludwig, 1876; W. B. Carpenter, 1876; 

 P. H. Carpenter, 1876, 1881, 1884, 1887, 1888; von Graff, 1877, 1884; Braun, 1888; 

 Rolleston and Jackson, 1888; Hamann, 1889; Ivoehler, 1895; A. H. Clark, 1908, 1912]. 



Bantayan Reef, Cebu, Philippines (14, M. C. Z., 378, 389, 390). 



Port Galera, Mindoro, Philippines [H. L. Clark, 1921] (26, M. C. Z., 625, 638, 

 639, 643, 644, 646). 



No locality [A. H. Clark, 1913] (1, B. M.) 



Geographical range. — From Torres Strait, northeastern Australia, and the 

 Abrolhos Islands, Western Australia, northward to the Philippines and westward to 

 Sumatra. 



Bathymetrical range. — From the shore line down to 106 meters. 



Occurrence. — At Mer Dr. H. L. Clark found this species only near the outer 

 margin of the southwestern reef flat, and on Bantayan Reef, Cebu, Dr. L. E. Griffen 

 found specimens attached to the roots and stems of gorgonians. 



In dredging operations this species has only been found on bottoms of lithotham- 

 nion or coral, or coral sand and shells. 



History. — Beginning in 1876 this species was frequently mentioned in papers by 

 Ludwig and by W. B. and P. H. Carpenter dealing with the anatomy of the crinoids, 

 but no indications were given of the characters by which it might be distinguished 

 from other species. In 1877 von Graff described the myzostomes found upon it. 

 The material upon which all these references were based had been collected at Bohol, 

 in the Philippine Islands, by Prof. Carl Semper. 



In 1888 Dr. P. H. Carpenter inserted the specific name 7iigra in his key to the 

 species of the "Stelligera group" of Actinometra. He gives as the distinctive features 

 the partial visibility of the radials and entire visibility of the IBri and the occurrence 

 of three "postdistichal axillaries." 



In 1895 Professor Koehler recorded this species, under the name of stelligera, 

 from the Bay of Amboina, and quoted Carpenter as saying that nigra is a synonym 

 of stelligera, though I can not find that Carpenter ever made the statement. 



On February 14-16, 1908, the Albatross dredged a number of specimens of this 

 species in the region of Jolo. These were recorded in a paper published by the 

 present author on December 23, 1908, in which a short description of the species 

 was given. Other specimens collected by the Albatross in the Philippines were re- 

 corded in 1909 and in 1911, a specimen from the Malacca Strait in 1912, and one 

 without locality m the British Museum collection in 1913. 



Dr. A. Reichensperger in 1913 recorded a large specimen from the Aru Islands, 

 and in 1915 Dr. H. L. Clark recorded 2 from Mer in Torres Strait. 



