A MONOGRAPH OF THE EXISTING CRINOIDS 515 



Carpenter, 1881, Antedon protecta P. H. Carpenter, 1881 and 1888, and Hartlaub, 

 1890, Antedon aequipinna P. H. Carpenter, 1882, Antedon imparipinna P. H. Car- 

 penter, 1882, and Hartlaub, 1891, Antedon conjungens P. H. Carpenter, 1888, Antedon 

 amboinensis Hartlaub, 1890, and Antedon okelli Chadwick, 1904. Bell's record of 

 Antedon indica from Blanche Bay, New Britain, and part of the specimens recorded 

 by Bell and later by Thurston from the Gulf of Manaar were also assigned to this 

 species. 



Specimens were recorded from Colombo breakwater, Ceylon, Port Blair, the 

 Andaman Islands, and ?India, and in an appendix from Cinque Island, Andamans, 

 Investigator station 91, and the entrance to Palk Strait. A complete list of the 

 localities from which the species is known was given. The specimens from the Red 

 Sea, Suez Bay, and Suakim Harbor, localities taken from Chadwick, should have been 

 referred to palmata (=klunzingeri). 



I listed Dichrometra laevicirra separately but said it would not be surprising if it 

 should turn out to be the same thing as D. protectus. Dichrometra similis was also 

 listed separately, and I said I was inclined to believe that it would turn out to be 

 identical with D. protectus. I said further that Bell's Antedon moorei is apparently 

 the same thing but is a young specimen ; the spines on the cirrus segments are a trifle 

 more conspicuous, and the animal is all around more slender, as would be expected. 

 In the type of similis the cirrus segments are never quite so long as broad, the earlier 

 being longer than broad in moorei, probably owing to the undeveloped condition of 

 the latter. 



Under Dichrometra palmata (=klunzingeri) specimens were recorded from 

 Gwada, Baluchistan, Snod Island, and ?Celebes. Of the previous records for this 

 species cited, Ceylon, Java, Singapore, Bougainville Island, and Tonga refer to the 

 present species. It was noted that the specimen from Bougainville Island (recorded 

 in 1909 as D. protectus) was identified as palmata (=klunzingeri) by P. H. Carpenter. 



I listed Dichrometra subtilis separately and referred only to the type specimen. 



In a list of undetermined species the original description of Antedon moorei was 

 quoted, and notes on the type specimen were given. It was said to be an immature 

 specimen of the species called similis by Carpenter, which is rather doubtfully distinct 

 from D. protectus. 



In 1913 Dr. August Reichensperger recorded Dichrometra palmata from Ceylon 

 and from Amboina and gave notes on the specimens. He also recorded D. protectus 

 from Amboina and Ceylon, giving brief descriptions of the specimens. Reichen- 

 sperger said that the variations in D. protectus are chiefly in the relative development 

 of the proximal pinnules, the number of the cirri, and the relative close approximation 

 of the division series. 



In a revision of the family Mariametridae published in 1913 I assigned this species 

 and its various synonyms to the new genus Lamprometra. 



In a paper on the crinoids of the British Museum published hi 1913 Antedon 

 conjungens, A. similis, A.occulta, A. palmata, of Bell, 1888, and Thurston, 1894, in 

 part, Antedon indica of Bell, 1899, and the manuscript names Antedon aequipinna and 

 A. protectus found with specimens in that institution, were placed in the synonymy 

 of Lamprometra protectus. Notes were given on specimens from the Cebu reefs (the 

 type of conjungens P. H. Carpenter), Challenger station 174 (the types of similis and 



