586 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



At the same time he described as a new species Actinometra spinipinna which he 

 said is near trichoptera. This new species, the type specimen of which bore no 

 locality label, is also C. japonica. 



In 1913 I published notes upon the specimens of this species contained in the 

 collection of the British Museum, and in two papers which appeared in 1915 I dis- 

 cussed its range in detail. 



COMANTHUS TASMANIAE A. H. Clark 



Comanthus trichoptera (part)A. H. CLAHK, Die Fauna siidwest-Australiens, vol. 3, Lief. 13, 1911, p. 

 456 (Tasmania, but not the other localities); Crinoids of the Indian Ocean, 1912, p. 95 (Tas- 

 mania); Die Crinoiden der Antarktis, 1915, p. 167 (Tasmania); Internat. Revue d. gesamt. 

 Hydrobiol. u. Hydrogr., 1915, pp. 226 and following (Tasmania). H. L. CLARK, Biol. Results 

 Fishing Exper. F. I. S. Endeavour, 1909-1914, vol. 4, pt. 1, 1916, pp. 5, 17. A. H. CLARK, 

 Unstalked crinoids of the Siboga Exped., 1918, p. 49 (in key; Tasmania). 



Comanthus (Bennettia) trichoptera (part) A. H. CLARK, Mem. Australian Mus., vol. 4, pt. 15, 1911, p. 

 755 (Tasmania). 



Comanthus tasmaniae A. H. CLARK, Proc. Biol. Soc. Washington, vol. 31, 1918, p. 41 (listed from 

 Tasmania; synonymy [Comanthus spanoschistum erroneously included]); p. 42 (detailed des- 

 cription; Tasmania; probably the same as the multibrachiate specimens of Comanthus span- 

 oschistum [error]); p. 43 (compared with C. novaezealandiae) . 



Diagnostic features. This species is very closely related to C. trichoptera, but the 

 cirri have 14-16 segments, of which the longest are two and one-half times as long as 

 broad. There are about 40 (37) arms which are 65 mm. in length. 



Description. The centrodorsal is discoidal, rounded pentagonal in outline, ex- 

 tremely thin, 4 mm. in diameter. The cirri are arranged in a single incomplete and 

 more or less irregular marginal row. 



The cirri are XX, 14-16, slender, 10 mm. long. The first segment is broader 

 than long, the second is as long as, or slightly longer than, broad, the third is twice as 

 long as broad, the 3 following are about two and one-half times as long as broad, and 

 their successors rapidly become shorter, so that the terminal 8 are broader than long. 

 These last are somewhat compressed laterally and in lateral view appear slightly 

 broader than those preceding. With the 1 or 2 preceding they each bear a small 

 pointed subterminal tubercle. 



The arms in the type specimen are 37 in number and resemble those of C. tri- 

 choptera. The distal edges of the elements of the division series and the of brachials, 

 especially the latter, are strongly everted and finely spinous. 



Locality Tasmania [A. H. Clark, 1911, 1918] (2, U.S.N.M., 34976; Austr. M.). 



Remarks. In 1911 I recorded under the name Comanthus trichoptera 2 speci- 

 mens from Tasmania which were not quite typical of the species as represented on the 

 coast of southern Australia. 



Later, after the description of Comanthus benhami in 1916 and the receipt of a 

 second new form (novaezealandiae) from New Zealand, I decided that the peculiarities 

 of these 2 Tasmanian specimens warranted their recognition as representatives of a 

 new species. 



One of them had been returned to the Australian Museum, so the description of 

 Comanthus tasmaniae was based upon the single specimen which had been retained 

 by the National Museum. 



