PART 5 A MONOGRAPH OF THE EXISTING CRDsOIDS 37 



[NOTE BY A.M.C.] As explained earlier, the idea of a close relationship with 

 Ptilometra has since been discarded. 



Localities. Hamburg Southwest Australian Expedition station 56 ; Koombana Bay, 

 6-7 miles southwest of Bunbury, Western Australia; 14%-1S meters; rocky bottom with 

 a few plan tlike organisms; July 28, 1905 [A. H. Clark, 1911, 1915, 1921] (3, U.S.N.M., 

 E.8035; H.M.). 



Koombana Bay, 1 or 2 miles west of the breakwater at Bunbury, Western Aus- 

 tralia; 9-15 meters; H. L. Clark and E. W. Bennett, October 26, 1929 [H. L. Clark, 

 193S] (148, M.C.Z., 964; U.S.N.M., E. 8035; 4, B.M.). Type locality. 



Garden Island, near Fremantle, Western Australia; E. W. Bennett, 1929 [H. L. 

 Clark, 1938] (3, M.C.Z.). 



Geographical range. Coast of southwestern Australia from Bunbury to Fremantle, 

 Western Australia. 



Bathymetrical range. From shallow water down to about 18 meters. 



Plistory. The first examples of this species known were three specimens collected 

 by the Hamburg Southwest Australian Expedition off Bunbury in 1905 and recorded 

 by the author as the young of Ptilometra macronema in 1911. One of these was figured 

 in part 1 (fig. 92, p. 151) and another in part 2 (fig. 205, p. 141), both as the 3'oung 

 of P. macronema. 



On October 26, 1929, Dr. H. L. Clark and Prof. E. W. Bennett found this species 

 to be very common, indeed the commonest comatulid, 1 or 2 miles west of the break- 

 water at Bunbury hi 5 to 8 fathoms; they preserved a large number of specimens, of 

 which Dr. Clark brought back 148. In addition he brought back 3 small specimens 

 (labeled as having been taken near Garden Island off Fremantle) which had been 

 given him by Professor Bennett. 



Dr. Clark was so very land as to submit all his specimens, of this and allied species, 

 to me with the request that I determine their affinities and describe them if they 

 proved to be new, and also diagnose the new genus which we agreed that they, together 

 with wilsoni and paedophora, represented. I prepared the account given herein with 

 a diagnosis of the new genus Aporometra, a key to the included species, and a descrip- 

 tion of A. occidentalis. But I was unwilling to publish it because of Dr. Clark's ob- 

 vious prior rights. There was no reason why I should either diagnose a new genus 

 worked out by him, or describe a new species collected and determined by him, especially 

 as some years before I had identified it as something quite different. So I sent him 

 my notes and descriptions to use as he saw fit. 



Dr. Clark described Aporometra occidentalis in 1938, his description being an 

 abridgment of the one given herein, and gave notes on the occurrence of the species 

 and on its viviparous habit. He refused, however, to incorporate my account of the 

 skeletal structure, or my description and figures of the young. 



Suborder MACROPHREATA A. H. Clark 



Antedonoida A. II. CLARK, Amer. Nat., vol. 42, No. 503, 1908, p. 723 (a new suborder; rounded 



pinnules and large eggs; range of genera and species). 

 Comatulida Macrophreata A. H. CLARK, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 174 (includes 



Antedonidae, Atelecrinidae and Pentametrocrinidae) ; Crinoida of the Indian Ocean, 1912, p. 44 



(in key); Die Crinoiden der Antarktis, 1915, p. 113 (diagnosis; geological occurrence; geographical 



and bathymetrical ranges) . 



