A MONOGRAPH OF THE EXISTING CRINOIDS 245 



Aru Islands; Dr. H. Merton's station 11; off Pulu Bambu; 10 meters; rocky 

 bottom, witb sand and coral; April 3, 1908 [Reichensperger, 1913]. 



Geographical range. — Aru Islands and Queensland soutb to Port Molle. 



Bathymetrical range. — From tbe shoreline down to 22 (?36) meters. 



History. — The first known specimen of this species was a small individual col- 

 lected by the Alert. At the time the Alert collections were studied it was not dis- 

 tinguished from the specimens of Amphimetra discoidea dredged at the same time 

 and was recorded with these under the name of Antedon milberti. 



Dr. Clemens Hartlaub in 1890 described this species as Antedon nematodon from 

 a specimen from Bowen, Queensland, in the Hamburg Museum, redescribing and figur- 

 ing it in the following year. 



When the genus Antedon was first revised by me in 1907 nematodon was assigned 

 to the new genus Himerometra. 



In my memoir on the recent crinoids of Australia and also in my report on the 

 crinoids collected by the Hamburg Southwest Australian Expedition, both of which 

 were published in 1911, nematodon was transferred to the genus Heterometra. In 

 both of these memoirs Port Molle was given as a locality for the species, and in the 

 former this record was said to be based upon a small specimen which had been col- 

 lected by the Alert. In my monograph on the crinoids of the Indian Ocean published 

 in 1912, I gave Heterometra nematodon as occurring at Bowen and Port Molle and said 

 that at the British Museum I had found, in a large jar full of specimens of Amphi- 

 metra discoidea (labeled Antedon milberti), a small example of this species dredged by 

 the Alert at Port Molle in 12 to 20 fathoms. 



In a paper on the crinoids of the Hamburg Museum published in 1912 notes were 

 given on the type specimen, which the author had examined in 1910, and in 1913 in 

 a paper on the crinoids in the British Museum the specimen from Port Molle was 

 formally recorded. In both of these papers the species was assigned to the genus 

 Amphimetra under the heading Amphimetra nematodon. 



In 1913 Dr. August Reichensperger recorded, as Heterometra nematodon, two speci- 

 mens collected by Dr. H. Merton in the Aru Islands in 1908. He gave extensive notes 

 on these and also discussed certain peculiarities of the species as illustrated by them. 



In the report on the unstalked crinoids of the Siboga expedition published in 1918, 

 nematodon was included in the key to the species of Heterometra but was not further 

 mentioned as it was not collected by the Siboga. 



HETEBOMETRA QUINDUPLICAVA (P. H. Carpenter) 



Plate 26, Figure 107; Plate 34, Figures 149-151 



[See also vol. 1, pt. 1, figs. 185, 186 (centrodorsal), p. 235; fig. 253 (centrodorsal), p. 253; fig. 470 



(centrodorsal) , p. 359.] 



Antedon sp. P. H. Carpenter, Quart. Journ. Geol. Soc, Feb. 1880, p. 41, footnote, pp. 42, 43 (Chal- 

 lenger station 212); Challenger Reports, Zoology, vol. 11, pt. 32, 1884, p. 51, 9th line. 



Antedon clemens P. H. Carpenter, Challenger Reports, Zoology, vol. 26, pt. 60, 18S8, p. 229 (descrip- 

 tion; Challenger station 212), pi. 39, fig. 5. — Hartlaub, Nova Acta Acad. German., vol. 58, 

 No. 1, 1891, p. 37 (iD key). — Hamann, Bronns Klassen und Ordnungen des Tier-Reichs, vol. 2, 

 Abt. 3, 1907, p. 1581 (listed).— A. H. Clark, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 273 (ab- 

 normal ray of type in its relation to arm structure of Eudiocrinus) ; vol. 39, 1911, p. 541 (same 

 as A. anceps P. H. Carpenter and as Craspedometra aliena A. H. Clark [referring to specimens 



