A MONOGRAPH OF THE EXISTING CRINOIDS 75 



described by a translation of the redescription publislied by Miiller in 1843, the only 

 emendation being in the size, which is given as 80-100 mm. (expanse). To the descrip- 

 tion a note was added which says that the species is from the seas of Austraha (Nou- 

 velle-Hollande) where it is often found attached in large numbers to the broad foH- 

 aceous expansions of the polyzoan Adeona. 



In 1866 Dr. Wilham Benjamui Carpenter remarked that this species is quite 

 distinct from Delle Chiaje's Comatvla adeoriae, which is Antedon rosaceus {=mcdi- 

 terranea). 



In his Natural History published in 1867 Knight included the account of Comatvla 

 adeonae given ui the Penny Encyclopedia in 1837, together with the figure of Savigny's 

 Comatula wMtiradiata. 



Dr. Philip Herbert Carpenter in the autumn of 1876 visited the Paris Museum 

 and examined the types of Comatula adeonae. In 1879 he referred adeonae to the 

 genus Antedon as understood by him — that is, as including all the comatulids not 

 assignable to Achnometra. 



Prof. Francis Jeflrey Bell in October 1882 proposed a specific formula ior Antedon 

 adeonae, which was emended by P. H. Carpenter in April 1883. 



In his report upon the comatuhds collected by the Alert pubhshed in 1884 Prof. 

 F. Jeffrey Bell recorded Antedon adeonae from Port Curtis and Port Denison, and gave 

 notes on the color of the specimens. He remarked that — 



There is a curious error in connexion with this species which does not seem to have been noticed. 

 Lamarck described it as "C. radiis pinnatis dents &c;" de Blainville, while quoting Lamarck, refers 

 also to his own figures in his 'Atlas' (pi. xxvi.); in this reference he is followed by J. Miiller and by 

 the editors of the second edition of Lamarck. The figures, however, when referred to are seen to 

 be those of a species with twenty arms and with cirri nearer thirty than twenty. It is not perhaps 

 necessary at this distance of time to waste time in inquiring what species it is that de Blainville has 

 there figured. 



At the same time Professor Bell described and figured a new species, Antedon 

 hidens, from Torres Straits, and recorded Antedon pinniformis from Dundas Strait, 

 Northwestern Austraha. His specimens of adeonae, hidens, and pinni/ormis are all 

 examples of the present species. 



In his report upon the comatulids of the Challenger expedition pubhshed in 1888 

 Dr. P. H. Carpenter placed bidens and adeonae in a list of six species that according to 

 him do not seem to fit into any of his specific groups. In the key to these six species 

 bidens is said to have Pi the largest and the cirrus segments vnth two dorsal spinelets 

 whereas adeonae is placed under the contrasting heading "The lower pinnules tolerably 

 equal." Antedon adeonae is paired with A. laevipinna; it is said to have "Tsventy 

 cirrus-joints without spines; syzygial mterval three or four joints" whereas laempinna 

 is placed under the heading "Twenty-five to tliirty-five spmy cirrus-joints; syzygial 

 interval nine or ten joints." Carpenter gave Queensland as the habitat for adeonae, 

 and Torres Straits as the habitat for bidens. He also accepted as correct Bell's 

 record of Antedon pinniformis, giving as the habitat of tlus species "New Guinea; 

 North-West Austraha." 



In 1888 Bell compared Antedon bidens with his new species A. {Compsometra) 

 incommoda. 



Prof. Ludwig Doderlein in 1898 described and figured several specimens of 

 Antedon bidens from Thursday Island. 



