230 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Bibb station SOP (2A); south of the Dry Tortugas (lat. 24 27' 30" N., long. 

 82 59' 30" W.)| 31 meters; mud; January 15, 1869 [Pourtales, 1869; Hartlaub, 1912] 

 (fragments, M. C. Z., 497). 



Florida [Hartlaub, 1912]. 



Blake station 127; off Santa Cruz, Virgin Islands (lat. 17 46' 10" N., long. 

 64 53' 15" W.); 69 meters; temperature 24.83 C.; sand, black specks, and shells; 

 January 4, 1879 [Hartlaub, 1912]. 



Off the western end of Thatch Island, Virgin Islands; 25-29 meters; Th. Morten- 

 sen, March 12, 1906 (1, C. M.). PI. 19, fig. 45. 



Blake station 155; off Montserrat (lat. 16 41' 54" N., long. 62 13' 24" W.); 

 161 meters; temperature 20.56 C.; January 16, 1879 [P. H. Carpenter, 1888; Hart- 

 laub, 1912]. 



Blake station 285; off Barbados (lat. 13 05' 12" N., long. 59 37' 18" W.); 24 

 meters; coral bottom; March 7, 1879 [von Graff, 1884; P. H. Carpenter, 1888; Hart- 

 laub, 1912; A. H. Clark, 1921] (1, M. C. Z., 197). 



Pernambuco or Parahyba do Norte, Brazil; Dr. John C. Branner [Rathbun, 

 1879; P. H. Carpenter, 1888; A. H. Clark, 1921] (3.U.S.N.M., 34833). 



Challenger; Bahia, Brazil; 13-37 meters [P. H. Carpenter, 1880, 1887, 1888; 

 A. H. Clark, 1913] (6, U.S.N.M., 17528; M. C. Z., 196; B. M.). PI. 19, figs. 42-44. 



Geographical range. From the Bahamas and the Dry Tortugas southward to 

 Bahia, Brazil. 



Bathymetrical range. From 16 to 161 meters. 



Thermal range. There are 2 records, 20.56 and 24.83 C. 



History. This species was originally described by Count Pourtales from an 

 immature specimen from off. Orange Key, Bahama Bank, in 9 fathoms, and some 

 detached arms from a large individual dredged near the Tortugas in 17 fathoms. 

 Pourtales gave the number of arms as 10, and said that the mouth is central. He 

 described it under the generic name Antedon. 



In his memoir on the genus Actinometra published in 1879 Dr. P. H. Carpenter, 

 on the basis of Pourtales' description, determined Antedon rubiginosa as a true Antedon. 



In 1879 Dr. Richard Rathbun, in a paper on Brazilian echinoderms, under the 

 heading of "Antedon, sp." gave a minute description of some specimens which had 

 been found in great abundance at some locality not definitely recorded, but either 

 on the coast of Pernambuco or of Parahyba do Norte, by Dr. John C. Branner. 



In 1880 Dr. P. H. Carpenter in a discussion of fossil comatulids described and 

 figured in detail the centrodorsal and radials of this species, the material having 

 been collected by the Challenger at Bahia. He referred to it under the name of 

 Actinometra lineata. 



Prof. F. Jeffrey Bell in 1882 listed Antedon rubiginosa, following Carpenter 

 (1879) in the generic allocation of the type; but Carpenter had now received from 

 Mr. Alexander Agassiz the Blake and other collections brought together by the ships 

 of the United States Coast Survey, and in his critical commentary on Bell's paper 

 dated 1882, but published early in 1883, he was able to place rubiginosa correctly 

 in the genus Actinometra. 



