Comatula Lamarck. 



Subgenus Validia A. H. Clark. 



Key to the Species of the Subgenus Validia. 



a 1 All of the arms the same length (northern Australia and the Aru Is- 



1 a n d s) rotalaria 



a 2 The outer arms arising from each IIBr series are much shorter than the inner 



(northwestern Australia and the Aru Islands) etheria 



i. Comatula f Validia) rotalaria (Lamarck). 



Lamarck. Hist. nat. des animaux sans vertèbres, vol. 2, 18 16, p. 534. 



P. H. Cari'ENTER. Proc. Roy. Soc., vol. 28, 1879, p. 390 [Actinometra jukes 



Bell. "Alert" Report, 1884, p. 168 [Actinometra jukesi); p. 169, pi. 17, figs. A, Ka [Acti- 

 nometra paucicirrd). 



BELL. Proc. Linn. Soc. New South Wales, vol. 9, 1885, p. 498 [Actinometra jukesi). 



P. H. CARPENTER. "Challenger" Reports. Comatulae, 1888, p. 291, pi. 4, fig. 6; pi. 5, fig. 

 3 ; pi. 54 [Actinometra paucicirra and Act. aruensis). 



DÖDERLEIN. Denkschr. Ges. Jena, vol. 8, 1898. p. 479 (Actinometra paucicirra). 



A. H. Clark. Buil. du Mus. d'hist. nat., Paris, N" 4, 1911, p. 247. 



Die Fauna Südwest-Australiens, vol. 3, 191 1, part 13, pp. 437, 440, 443 — 445. 



Recent Crinoids of Australia, 191 1, p. 739. 



Crinoids of the Indian Ocean, 1912, p. 79. 



Smithsonian Miscellaneous Collections, vol. 61, 191 3, N" 15, p. 8. 



REICHENSPERGER. Abhandl. der Senck. naturforsch. Ges., vol. 35, 191 3, Heft 1, p. 83. 



A. H. CLARK. Internationale Revue der gesamten Hydrobiologie und Hydrographie, 1915, 

 p. 224. 



Stat. 273. Anchorage off Pulu Jedan, eastern coast of the Aru Islands (Pearl Banks). 13 

 Metres. 1 Ex. 



This is a particularly fine specimen with 20 arms 165 mm. long, the posterior arms 

 being 1 20 mm. long ; all of the arms are grooved ; the centrodorsal exactly fills the space 

 between the radials, its surface being on precisely the same level as theirs so that its borders 

 are difficult to detect. 



2. Comatula (Validia) etheridgei A. H. Clark. 



A. H. Clark. Recent Crinoids of Australia, 191 1, p. 741. 



Die Fauna Südwest-Australiens. vol. 3, 191 1, part 3, pp. 440, 444, 445. 



Crinoids of the Indian Ocean, 191 2, p. 79. 



Smithsonian Miscellaneous Collections, vol. 61, 1913 X" 15, p. 8. 



Internationale Revue der gesamten Hydrobiologie und Hydrographie, 1915, p. 224. 



Stat. 273. Anchorage off Pulu Jedan, eastern coast of the Aru Islands (Pearl Banks). 13 

 Metres. 5 Ex. 



The largest specimen has the inner arms 45 mm. long and the longest outer arms 20 

 mm. long ; some of the outer arms are not so long as the pinnules which they bear ; these 



SIBOGA-EXPEDITIE XI.Il/'. 4 



