THE RECENT CRINOIDS OP AUSTRALIA CLARK. 767 



Range. — Singapore and the Philippine Islands southward to 

 Australia, reaching Port Molle on the eastern coast. 



There is a specimen of Amphimetra discoidea in the Paris 

 Museum labelled by P. H. Carpenter " Comatula (Antedon) 

 milberti, var. dihrachiatay which closely resembles the type in the 

 United States National Museum ; it has 26 or 27 cirrus segments. 

 It appears to have been the specimen from which the drawing of 

 " Comahda carinata" in Guerin-Meneville's " Iconographie du 

 regtie animal " (Plate 1, fig. 2a) was made. 



AMPHIMETRA MILBERTI (J. Mitller). 



Comatula (Alecto) milherti, 1846, J. Miiller, Monatsber. preuss. 



Akad., 1846, p. 178 ("North America"). 

 Comatula jacquinoti, 1846, J. Miiller, loc. cit. (Ceram). 

 Comatula laevissima {p-a.rt), 1875, Grube, Jahresber. d. schles. 



Ges. fiir vaterl. Cultur, 1875, p. 74 (North Borneo). 

 Antedon milberti (part>, 1884, Bell, Rep. Zool. Coll. H.M.S. 



"Alert," p. 156 (Port Molle). 

 Amphimetra milberti, 1909, A. H. Clark, Proc. Biol. Soc. Wash- 

 ington, vol. 22, p. 7. 

 Differential Characters. — This species is easily distinguished 

 from the preceding by its very stout cirri, all of the segments in 

 which are twice as broad as long. 



Australian Record. — The "Alert" obtained a single specimen 

 of this species at Port Molle ; all the other specimens listed in 

 the "Alert" Report from Port Molle belong to the preceding 

 form. 



Range. — Mergui Archipelago to Borneo and the Philippine 

 Islands, and south to northern Australia. 



Genus HETEROMETRA, ^. ZT. Clark. 



ffeterometra, 1909, A. H. Clark, Proc. Biol. Soc. Washington, 

 vol. 22, p. 11 (Antkdon quinduplicava, P. H. Carpenter, 

 1888). 



Di^erential Characters. — The II Br series of Heterometra are 

 4 (3 + 4) and the succeeding division series, which are irregularly 

 developed, are 2. In general the arm number is from fifteen to 

 thirty. The proximal pinnules, usually excepting P^, are en- 

 larged, but are always slender and flagellate distally ; the outer 

 brachials are distinctly wedge-shaped and of moderate length. 



Range. — Heterometra is found from East Africa eastward to 

 northern Australia and the Philippine Islands. 



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