THE RECENT CRINOIDS OF AUSTRALIA — CLARK. 757 



Range. — Beluchistan to northern Australia, Fiji, Tonga, aud 

 the Gilbert Islands, and northward to southern Japan. 



Type Species. — Alecto parvicirra, J. Miiller, 1841. 



BemaHs. — The specific gx'oup Vania covers exactly the same 

 ground as was intended by the specific group Validia established 

 by myself in 1909. The type of Validia is Comatula rotalaria, 

 Lamarck, 1816, chosen on the basis of the description given by 

 Carpenter in the " Challenger " Report. Examination of the 

 types of Comatida rotalaria at Paris, however, has shown that 

 this species is the same as the Actinometra jukesii and Actino- 

 metra paucicirra described many years later by Carpenter and 

 Bell ; therefore the name Validia lapses into the synonymy of 

 Coinatula, though it will become available if it should ever be 

 thought advisable to separate the twenty-armed from the ten- 

 armed species assigned to that genus. 



COMANTHUS (VANIA) ANNULATA (Bell) 



Actinometra intricata, Liitken, MS. (part), (Bowen). 



Actinometra intricata (part), 1874, Liitken, Cat. Mus. Grodeffroy, 

 vol. v., p. 190 (Bowen). 



Actinometra annulata, 1882, Bell., Proc. Zool. Soc, 1882, p. 535, 

 pi. XXXV. (Cape York). 



Actinometra meyeri, 1882, P. 11. Carpenter, Journ. Linn. Soc. 

 (Zool.), vol. 16, p. 525 (Australia). 



Actinometra valida, 1888, P. H. Carpenter, " Challenger" Reports, 

 Zool., vol. 26, p. 314, pi. lix., fig. 3 (Prince of Wales 



Channel). 



Actinometra littoralis, 1888, P. H. Carpenter, "Challenger" 

 Reports, Zool., vol. 26, p. 346, pi. Ixvii., figs. 1, 2 (Banda). 



Comanthus intricata, 1908, A. H. Clark, Proc. Biol. Soc. Wash- 

 ington, vol. 21, p. 220 (Bowen). 

 Comanthus {Comanthus) valida, 1909, A. H. Clark, Vidensk. 

 Medd. fra den naturhist. Forening i Kobenhavn, 1909, )). 

 143 (Bowen). 

 Differential Characters. — This species rarely has more than one 

 or two cirri, and usually has none ; if present, they are larger and 

 stouter than those of C. parvicirra, with a few more segments ; 

 they are shorter and stouter than those of C. trichoptera with 

 proportionately much shorter segments. The arms are usually 

 between forty and sixty in number; the division series are 

 almost all 4(3 + 4), but some are always to be fouud of 2, especi- 

 ally in the II Br series. 



