Bett—On the Echinoderm Fauna of the Island of Ceylon. 645 
A.—PELMATOZOA. 
I. CRINOIDEA. 
1. ANTEDON CARINATA. 
Comatula carinata. Lamarck, Hist. Anim. sans Vertebr., 11., p. 534. 
Antedon carinata. Carpenter*, Chall. Rep., p. 199. 
2. ANTEDON ADEONAE. 
Comatula adeonaue. Lamarck, Anim. s. Vert., 11., p. 539. 
Alecto adeonae. Miiller, Arch. f. Nat., 1843, p. 135. 
Antedon adeonae. Bell, Rep. Voy. Alert, p. 156. 
As I have already pointed out, there is a curious error in connexion with this 
species. Although Lamarck describes it as “‘C. radiis pinnatis denis,” de Blainville 
refers to a twenty-armed species in his Atlas (Manuel d’Actinologie, pl. xxvi.); 
and in this error the latter has been followed by succeeding naturalists. 
3. ANTEDON REYNAUDI. 
Comatula (Alecto) reynaudii. Miiller, MB Acad., Berlin, 1846, p. 178. 
This twenty-armed form has never, to my knowledge, been found again since 
the expedition of the Chevrette. 
4. ACTINOMETRA CUMINGII. 
Comatula cumingit. Miiller, Die Gattung Comatula, p. 19. 
Actinometra cumingii. Bell, Rep. Voy. Alert, p. 167. 
This is, typically, a ten-armed species, but injury and subsequent repair 
frequently lead to the development of a larger number of arms. 
5. ACTINOMETRA PARVICIRRA. 
Alecto parvicirra. Miiller, MB Acad., Berlin, 1841, p. 189. 
Alecto timorensis. Miiller, t. c., p. 186. 
Actinometra annotea. P. H. Carpenter, Journ. Anat. and Physiology, xi., p. 91. 
Actinometra polymorpha. P. H. Carpenter, Trans. Linn. Soe., i, p. 51. 
Actinometra parvicira. . PB: SH, Carpenter, Notes, Leyd. Mus., iil., p. 204; 
Chall. Rep. 
* Dr. Carpenter has been so kind as to allow me to see such advance sheets of his forthcoming 
Report on the Comatule of the Challenger Expedition as are yet printed. 
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