18 echinodermA. 



Family ANTEDONIDiE. 



Les Asterencriniens libres, cle Bl. Diet. Sci. Nat. lx. (1830) p. 229. 

 Pentacrinitidse, Gray, Synop. B. M. (1842) p. 119 ; id. Brit. Bad. 



(1848) p. 28. 

 Coniatulidse, d'Orbigny, Cours Elem.ii. (1852) p. 138 ; Bronn, Klass. u. 



Ordn. ii. (18G0) p. 233 ; Carpenter (sens, emend.), Chall. Rep. Comat. 



(1888) p. 63. 

 Coniatidiens, Duj. $ Hup. Echin, (1862) p. 191. 

 Antedonidse, Norman, Ann. 8,- Mag. xv. (1865) p. 101. 



Crinoids free when adult, with the top joint of the larval stem 

 persistent and cirriferous : the basal plates of the calyx complete 

 and external or vestigial and internal. Rays five or ten, simple or 

 divided once or more. Mouth central, except in Actinometra. 



One genus : Antedon. 



Subbranch II. ELEUTHEROZOA. 



Eleutherozoa, Bell, Ann. 8f Mag. viii. (1891) p. 214. 



The Eleutherozoa are actinogonidiate caliculate Echinoderms in 

 which the oral surface of the body looks downwards, the power 

 of locomotion is retained, and the podia are often locomotor in 

 function; the anus, if present, varies in position. 



Division I. AZYGOPODA. 



Azygopoda, id. t. c. 



The Azygopoda are Eleutherozoa in which the podia are all or 

 nearly all on the oral surface of the body only, and are separated 

 by terminal plates from any contact with the calycinal area. 



Class IX. ASTEROIDEA. 



Asterias (pars), Linn. Syst. Nat. x. (1758) p. 661 ; id. op. fit. xii. p. 1098. 



Asterias, Lanik. An. s. Vert. ii. (1816) p. 547. 



Asteridea, de Bl. Diet. Sci. Nat. lx. (1830) p. 216 ; Actinol. (1834) 



p. 235. 

 Asteries, Agass. Mem. Soc. Neuch. (1836) p. 190 ; id. Ann. Sci. Nat. vii. 



(1837) p. 284. 

 Asteriae, Forbes, Mem. Wern. Soc. viii. (1839) p. 118 ; Dub. $ For. Vet. 



Akad. Hdlg. 1844 (1846) p. 238. 

 Asteriadse, id, Brit. Starf. (1840) pp. xiv & 71. 

 CirrHgrada, id, ibid. 

 Asteroida, Gray, Syn. Brit. Mus. 42nd ed. (1840) p. 61 ; id. Ann, # 



Mag. vi. (1840) p. 178. 

 Asteri'da, M. Tr. Syst. Ast. (1842) p. 1. 

 Lobistella, Austin, Ann. $ Mag. x. (1842) p. 111. 

 Asteriadse, Bronn, Flass. u. Ordn. ii. (1860) p. 286. 

 Asteridse, Sars, Norg. Ech, (1861) p. 25. 



