THE RECENT CRINOIDS OF AUSTRALIA — CLARK. 761 



of the I Br series. The enormously long lower pinnules and 

 cirri, the latter reaching 40 nun. -45 mm. in the type, are charac- 

 teristic features of this species. The proximal pinnules remind 

 one very strongly of those of certain species of IIimero'}netra, as 

 for instance H. barfsehi, and the arm structure not infrequently 

 also approaches that characteristic of Ilimerometra, so that some 

 care must be used in identification. The heavily plated disk and 

 the presence of a pseudosyzygy between the elements of the I Br 

 series are, however, ample to differentiate this species from any 

 of the superficially similar forms among the Himerometridse. 



Australian Records. — Port MoUe, Queensland, in 12 fathoms; 

 Mermaid Strait, in the north-western part of Western Australia; 

 Torres Strait, in 10 fathoms ; Prince of Wales Channel, in 8 

 fathoms ; Cape York ; Thursday Island ; Holothuria Bank ; 

 Lewis Island, Dampier Archipelago ; Nicol Bay, North-western 

 Australia. 



Distribution. — This species is only known from the coasts of 

 northern Australia. 



Remarks. — In the type specimen the disk has been lost, and is 

 just beginning to regenerate ; this was mistaken for a normally 

 small disk, the error being responsible for the specific name. 



ZYGOMETRA MULTIRADIATA {P. H. C). 



? Hyponome sarsii, 1868, Loven, Forhandl.|Skand. Naturf. Chris- 

 tiania, vol. 10, p. liv. (Cape York). 



Antedon multiradiata, 1888, P. H. Carpenter, "Challenger" 

 Reports, Zool., vol. 26, p. 96, pi. ix. (off Booby Island, 

 Torres Strait, 6 fms.) 



Differe.ntial Characters. — This species is essentially like the 

 preceding, but it only has three axillaries above that of the I 

 Br series, and the proximal piunules are much less stout. 



Australian Record,. — This form was dredged by the " Chal- 

 lenger" in 10" 36' S. lat., 14° 55' E. long, (off Booby Island, 

 Torres Strait), in 6 fathoms ; in the British Museum I found 

 some specimens from North-western Australia, and from Lewis 

 Island in the Dampier Archipelago, as well as one collected by 

 the "Alert" in Somerset Passage, near Albany Island, in 5-9 

 fathoms. 



It is probably a detaciied visceral mass of this species which 

 was described by Professor Sven Loven a.H Hyponome sarsii ivom 

 Cape York. 



Range. — Northern Australia. 



