Vol. XXlll, pp. 7-8 March 23, 1910 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW CRINOID FROM THE SOLOMON ISLANDS. 

 BY AUSTIN H. CLARK. 



The trustees of the Australian Museum at Sydney, New South 

 Wales, through the curator, Mr. Robert Etheridge, Jr., have 

 recently accorded me the privilege of examining their extensive 

 and valuable collections of recent crinoids. The full report 

 upon the material will shortly be pul)lished in the "Australian 

 Museum Records " in the form of a monograph upon the crinoid 

 fauna of Australia. It has seemed advisable, however, to pre- 

 sent in advance the diagnosis of an interesting new species from 

 the Solomon Islands which was included among the specimens 

 sent to me. 



I take this opportunity of thanking the trustees of the Austra- 

 lian Museum and the curator, Mr. Etheridge, for their kindness 

 and generosity in submitting to me for study their very impor- 

 tant collections, the examination of which has served to clear 

 up many hitherto obscure points in regard to the interrelation- 

 ships of the Australian crinoid fauna. 



Colobometra diadema sp. nov. 



Type locaJity. — Ugi, Solomon Islands. The type specimen is in the 

 collection of the Anstralian ]\Iuseum. 



Cirri xi, 33-40, 22 mm. long, in general resembling those of €'. veprctum. 



Interambulacral areas of disk completely covered witli large plates. 



Ten arms abont 70 mm. long, more slender tlian those of C. vepretiim. 



Pa absent; Pi 10 mm. long, rigid and spinelike, resembling P2, witli 

 twelve segments, the first two not so long as broad, the third slightly 

 tapering and twice as long as the distal diameter, the following much 

 elongated, nearly or quite four times as long as broad; P2 to P5 similar, 

 but 12 mm. long; following pinnules shorter, more slender, and less 

 stiffened; distal pinnules 12 mm. long, very slender, the segments with 

 long spines on their distal edges. 



3— Proc. Biol. Soc. Wash., Vol. XXIII, 1910. (7) 



