52 CRINOIDEA. 



CRINOIDEA (see p. 17). 



ANTEDON. 



Antedon, de Freminville, Nouv. Bull. Soc. Philom. ii. (1811) p. 349 ; 



Norman, Ann. $ Mag. xv. (1865) p. 101 ; P. H. Carpenter, Chall. 



Rep. Comat. (1888) p. 85. . .. 



Asterias, Zmra. tyrt. 2V«*. x. (1758) p. 661 ; op. cit, xn. (1766) p. 1098 



Asteriatites, Schlotheim, Taschenbuch f. d. Mineralogie, vii. 1. (1813) 



Al?cto,' Zera*. Zool. Misc. ii. (1815) p. 61; Say (Alectro). 7. Acad. 



Nat, Sci. Philad. v. (1825) p. 153; J. Mull. Ber. Ah. Berl 1841, 



p 182; id. Abh. Ak. Berlin, 1841 (1843).. p. 203; id. (pars), Abh. 



Ah. Berl. 1847 (1849), p. 238. 

 Comatula, ZamJfc. ^». s. Vert. ii. (1816) p. 530 ; Miller, Nat. Hist. 



Crin. (1821) p. 128; de Bl. Diet. Sci. Nat. lx. (1830) p. 229; Ag. 



Mem. Soc. Neuch. i. (1836) p. 193. 

 Couiatulithes, Schlotheim, Petrefactenhunde, 1829, ii. p. 47. 

 Pentacrinus, V. Thompson, Mem. on Pentac. europseus, (1827) p. 10 ; 



Fleming, Brit. An. (1828) p. 493. 

 Hibernula, Fleming, op. cit. p. 494. 

 Phvtocrinus, de Bl. Diet. Sci. Nat. lx. (1830) p. 235. 

 Glenotremites, Goldfuss, Petref. Germ. i. (1832) p. 159. 

 Solanocrinites, id. op. cit. p. 166. 

 Ganymeda, Gray, Proc. Zool. Soc. 1834, p. 15 ; id. Brit. Bad. (1848) 



p. 28. 



Pterocoma, Ag. Mem. Soc. Neuch. i. (1836) p. 193. 



Solacrinus, id. op. cit. p. 196. " 



.Decacnemos, Bronn, Leth. Geognos. 2nd ed. (1837) p. 2/3. 



Hertha, Bar/enow, Neues Jahrb. 1840, p. 664. 



Comaturella, von Miinster, Beitr. z. Petref act, (1843) p. 97. 



Solanocrinus, Bronn, Ind. Pal. (1818) p. 1150. 



Decaiueros, uVOrbigny, Prod, Pal. ii. (1850) p. 121. 



Decacnemus, Bronn, Leth. Geognos. 3rd ed. (1851) ii. Th. iy. p. 133. 



Pterocoma, cPOrbigny, Cours Element, ii. (1852) p. 139. 



Coiuatulina, id. ibid. 



Allionia, Michelotti, Rev. et Mag. Zool. xiii. (1861) p. ^53. 



Hyponome, Loven, Forh, Skand. Naturf. x. (1869) p. liv. 



Kallispongia, Wright, Proc. R. Irish Acad. ii. (1877) p. 754. 



Geocoma, Fraas, Aus dem Orient, ii. (1878) p. 214. 



An Antedonid with five rays and central or subcentral mouth ; 

 oral pinnules devoid of comb, but all tbe pinnules with sacculi. 

 Hays divided once or more, with the ambulacral grooves equally 

 well developed on all the arms, which are of equal length. Centro- 

 dorsal generally hemispherical and conical; cirri twenty or more 

 in number. 



