THE RECENT CRINOIDS OF AUSTRALIA — CLARK. 763 



dorsal pole very slightly concave, 5 mm. in diameter; the ciiri 

 are xv., 50-53, 35 mm. to 38 mm. long ; there are thirty-five arms 

 80 mm. long ; the III Br series are 4 (3-1-4) exteriorly and 2 

 interiorly as in the genus Himerometra ; another has the centro- 

 dorsal discoidal about 4 mm. in diameter at the doi'sal pole, 

 nearly fiat ; the cirri are xxxv., 46-48, 35 mm. to 40 mm. long ; 

 4 (3 -f 4) series are slightly more numerous thfin usual ; the third 

 example is small with twenty arras 60 mm. long (all the II Br 

 series being present) ; the dorsal pole of the centrodorsal is flat, 

 2*5 mm. in diameter ; the cirri are xxiii., 20-22, 13 mm. long, 



Additional Australian Records. — PortMoUe, in 12-20 fathoms; 

 Thursday Island ; Arafura Sea (8° 56' S. lat., 136^ 05' E. long.), 

 49 fathoms; Torres Strait, in 10 fathoms; Prince of Wales 

 Channel, in 7 fathoms ; Mermaid Strait, North-western Aus- 

 tralia ; Baudiu Island, in 8-15 fathoms. 



Range. — Northern Coast of Australia from Mermaid Strait, 

 eastward and southward to Port Curtis, Queensland. 



Family H I M E R M E T R I D ^, A. H. Clark. 



Genus CRASPEDOMETRA, A. H. Clark. 



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

 vol. 22, p. 8 (Antedo7i acuticirra, P. H. Carpenter, 1882). 



Differential Characters. — Craspedometra in Australia is most 

 easily identified by its cirri ; these are very long, smooth dorsally, 

 very stout basally, but tapering gradually to a sharp point. Tlie 

 arms are from twenty-five to forty or more in number, the II Br 

 series being 4 (3 -f 4) and the III Br series 2, developed irregularly. 



Range. — East Africa (Madagascar to the Red Sea) to Australia, 

 and thence northward to Hong Kong and the Philippine Islands. 



CRASPEDOMETRA ACUTICIRRA (P. H. C). 



Antedon acuticirra, 1882, P. H. Carpenter, Journ. Linn. Soc. 



(Zool.), vol. 16, p. 509 (Unknown). 

 Antedon avstralis, 1882, P. H. Carpenter, torn, cit., p. 510 



(Sydney). 

 Antedon ludovici, 1882, P. H. Carpenter, torn, cit., p. 510(HoNG 



Kong). 

 Antedon bipartipiyma, 1882, P. H. Carpenter, torn, cit., p. 512 



(HoNG Kong). 

 Craspedometra acuticirra, 1909, A. H. Clark, Vidensk. Medd, 



fra den Naturhist. Forening i Kobenhavn, 1909, p. 159 



{Sydney). 



