REPORT ON THE CRINOIDEA. 267 



1846. Aetinometra, Muller, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, 1846, p. 178. 



1846. Comatula, Muller (pars), Ibid., p. 179. 



1849. Comatula (Alecto), Muller (pars), Abhandl. d. k. Akad. d. Wiss. Berlin, Jahrg. 1847 [1849], p. 246. 



1849. Comatula (Aetinometra), Muller, Ibid., p. 246. 



I860. Comatula, Bronn (pars), Klassen und Ordnungen des Tkierreichs, 1860, Bd. ii. p. 233. 



1862. Comatula, Dujardiu and Hupe (pars), Hist. Nat. des Zoophytes, Echinoderrues, Paris, 1862, p. 192. 



1862. Actiiwmetra, Dujardin and Hupe, Ibid., p. 208. 



1862. Comaster, Dujardin and Hupe (pars), Ibid., p. 211. 



1864. Aetinometra, Liitken, Vid. Meddel. nat. Foren. Kjtfbenhavn, 1864, p. 218. 



1865. Alecto, E. C. and A. Agassiz (pars), Seaside Studies, Boston, 1865, p. 121. 



1866. Aetinometra, Bohlsche, Archiv f. Naturgesch., 1866, Jabrg. xxxii. Bd. i. p. 90. 

 1866. Phanogenia, Loven, Ofversigt k. Vetensk.-Akad. Forbandl., 1866, No. 9, p. 231. 

 1869. Antedon, Pourtales (pars), Bull. Mus. Comp. Zool, 1869, vol. i. No. 11, p. 355. 

 1869. Comatula (Aetinometra), J. A. Herklots, Bijdragen tot de Dierkunde, 1869, ix. p. 10. 



1875. Comatula, Grube (pars), 53e Jahresber. der Schlesiscb. Gesellsch. f. Vaterl. Cult, 1875, p. 74. 



1875. Aetinometra, Grube, Ibid., p. 75. 



1877. Aetinometra, P. H. Carpenter, Journ. Linn. Soc. Lond. (Zool.), 1877, vol. xiii. p. 442. 



1878. Antedon, Pourtales (pars), Bull. Mus. Comp. ZobL, 1878, vol. v. No. 9, p. 214. 



1879. Aetinometra, P. H. Carpenter, Trans. Linn. Soc. Lond., ser. 2, 1879, vol. ii. p. 27. 

 1879. Aetinometra, P. H. Carpenter, Proc. Roy. Soc, 1879, vol. xxviii. p. 385. 



1879. Phanogenia, P. H. Carpenter, Ibid., p. 394. 



1879. Antedon, Rathbun (pars), Trans. Connect. Acad., 1879, vol. v. p. 157. 



1880. Aetinometra, P. H. Carpenter, Quart. Journ. Geol. Soc, 1880, vol. xxxvL p. 41. 

 1880. Aetinometra, Claus, Grundziige der Zoologie, 4th ed., 1880, Bd. i. p. 335. 

 1880. Phanogenia, Claus, Ibid., p. 335. 



1880. Actiiwmetra, P. H. Carpenter, Journ. Linn. Soc. Lond. (Zool.), 1880, vol. xv. p. 198. 



1881. Aetinometra, P. H. Carpenter, Notes from the Leyden Museum, 1881, voL iii. p. 176. 



1882. Aetinometra, Ludwig, Mem. Acad. Sci. Bruxelles, 1881 [1882], t. xliv. p. 6. 



1882. Aetinometra, P. H. Carpenter, Journ. Linn. Soc. Lond. (Zool.), 1882, vol. xvi. p. 514. 



1882. Aetinometra, P. H. Carpenter, Bull. Mus. Comp. Zool., 1882, vol. ix. No. 4, p. 13. 



1882. Aetinometra, Bell, Proc. Zool. Soc. Lond., 1882, p. 533. 



1882. Aetinometra, P. H. Carpenter, Ibid., p. 747. 



1884. Aetinometra, BeU, Rep. Zool. Coll. H.M.S. "Alert," Lond., 1884, p. 155. 



1884. Aetinometra, P. H. Carpenter, Proc. Roy. Soc. Edin., 1884, vol. xii. p. 369. 



1885. Aetinometra, P. H. Carpenter, Zool. Chall. Exp., part xxxii. vol. ix. 1884 [1885], p. 137. 

 1885. Aetinometra, Quenstedt, Handbuch der Petrefactenkunde, Aufl. 3, Tubingen, 1885, p. 913. 

 1885. Aetinometra, Bell, Proc. Linn. Soc. N. S. Wales, 1884 [1885], vol. ix. p. 498. 



1885. Aetinometra, Ludwig, Leuuis, Synopsis der Thierkunde, Dritte Auflage, Hannover, 1885, Bd. ii. 

 p. 948. 



Definition. — Centro-dorsal usually discoidal, and bearing fifteen or twenty marginal 

 cirri, rarely more; sometimes pentagonal or stellate with no trace of cirri, but occasionally 

 hemispherical and almost covered by them. Outer faces of the radials relatively wide, 

 with small muscle-plates, and nearly or cpute parallel to the vertical axis of the 



calyx. 



Disk with an excentric mouth and a variable number of unequal ambulacra, at least 

 two of which enclose the anal area in a horseshoe-shaped curve. Some of the arms, 

 generally only the hinder ones, may be much shorter than the rest, ungrooved, and non- 



