A MONOGRAPH OF THE EXISTING CRINOIDS 229 



Ceylon Pearl Oyster Fisheries station XXIV; off Trincomalee, Ceylon; 2)^ to 3 

 miles north of Foul Point; 44-84 meters; bottom hard and rough, probably rock; 1902 

 [Chadwick, 1904; A. H. Clark, 1912, 1918; H. L. Clark, 1915]. 



Ceylon Pearl Oyster Fisheries station XXV; off Trincomalee, Ceylon; % to 1 

 mile northwest of Foul Point; 15 meters; bottom firm, orbitolites sand and nullipores; 

 1902 [Chadwick, 1904; A. H. Clark, 1912, 1918; H. L. Clark, 1915]. 



Off Trincomalee, Ceylon [Chadwick, 1904; A. H. Clark, 1912, 1918; H. L. Clark, 

 1915] (1, U.S.N -M., 35310). 



Investigator; off the southern coast of Ceylon (lat. 6°01' N., long. 81°16' E.); 

 62 meters [A. H. Clark, 1912; H. L. Clark, 1915] (7, U. S. N. M., 35327 [original No.' 

 33D], 35341;!. M.). 



Muhlos, Maldive Islands; Prof. J. Stanley Gardiner [A. H. Clark, 1929] (2, B. M.). 



Investigator; Pedro shoal, north of the Laccadive Islands [A.H.Clark, 1912] (1 

 U. S. N. M., 35331). 



Bagamoyo, north of Dar-es-Salaam, Tanganyilca Territory (formerly German 

 East Africa) [A. H. Clark, 1912, 1918; Hartmeyer, 1916] (1, U. S. N. M., 35365 

 [original No. 4616]). 



Geographical range. — From Hong Kong, Macclesfield Bank, and the Philippine 

 Islands southward to New Guinea and westward to the Pedro Shoal, the Maldive 

 Islands, and Bagamoyo, Tanganyika Territory, east Africa. 



Bathymetrical range. — From the shore line down to 91 (?183) meters. Nearly 

 all the records are from water of less than 50 meters in depth. 



Occurrence.- — This species is very frequently found firmly attached by the cirri to 

 gorgonians, and a large proportion of the specimens I have examined had to be cut 

 from such supports. 



Chadwick records that many grayish mottled individuals were found upon a large 

 colony of Gorgonia {Rhipidogorgia) flabellum from Ceylon Pearl Oyster Fisheries 

 station XXIII. 



History.- — This species was first described by Dr. P. H. Carpenter in 1881 under 

 the name of Antedon serripinna from a specimen from Andai, New Guinea, in the 

 Leyden Museum. 



In October 1882 Prof. F. Jeffrey Bell proposed a specific formula for it which was 

 emended by Carpenter ui April of the year following. In the Alert report published 

 in 1884 Professor BeU compared his new species Antedon carpenteri with A. serripinna 

 (see page 213). 



In the Challenger report on the comatulids published in 1888 Carpenter included 

 serripinna in the key to the species in the MUberti group, in which it was paired with 

 carpenteri (see page 214). 



Dr. Clemens Hartlaub in 1891 described in detail nine specimens from the Tonga 

 Islands that he referred to Antedon serripinna, comparing them with the type specimen 

 from Andai, New Guinea. The specimens from Tonga, however, are more properly 

 referable to 0. caledoniae. 



In 1894 Professor Bell recorded some specimens from the Macclesfield Bank in 

 29-32 fathoms under the name of Antedon carinata. 



Herbert Clifton Chadwick in 1904 recorded specimens of Antedon serripinna from 

 stations XXIII, XXIV, and XXV of the Ceylon Pearl Oyster Fisheries investigations 



