A MONOGRAPH OF THE EXISTING CR1NOIDS 89 



The radials are visible as small paired tubercles in the interradial angles. The 

 IBr, are very short, deeply incised by the axillaries, and strongly cannate. The IBr, 

 (axillaries) are short, broad, over twice as broad as long, and strongly cannate. lhe 

 IIBr series resemble the IBr series, but the 2 elements are relatively slightly longer. 



The arms are 13 or 15 in number, 65 mm. long, with about 110 brachials of which 

 the first 8 or 9 are oblong and the following are triangular, not quite so long as broad, 

 becoming elongate distally. The brachials in the distal two-thirds of the arm overlap 

 more or less The elements of the IBr and IIBr series and the first 9 or 10 brachials are 

 sharply flattened laterally and are in close lateral apposition. The middle and distal 

 brachials are somewhat compressed laterally and have an ill defined median keel 



P, is 6 mm long, longer and stouter than the succeeding pinnules though not 

 markedly so with 12 segments which are about as long as broad and are flattened 

 exteriorlv The following pinnules decrease gradually in length to P 6 or P. which is 3 

 mm Ion- with 7 short segments, then become gradually longer again, reaching distally 

 a length of 8 mm. with 17 or 18 rather short segments, of which the first is short and 

 broad and the second trapezoidal. • 



LZlity -Albatross station 4936; Eastern Sea, off Kagoshima Gulf; Sata Misafa 

 Lfchtl beariL N 21° E., 5.7 miles distant (lat. 30°54'30" N., long. 130°37'30" E ) ; 

 llf metersT:tone S ; August 16, 1906 [A. H. Clark, 1907, 1908, 1912, 1915, 1918] (2, 



U S N.M., 22634 [type], 35594). 



U - Hist ' -This species was originally described under the name Antedon alboflava 

 from two specimens from Albatross station 4936 in 1907, the specimens having been 

 dreXed in the year previous. Later in 1907 it was transferred to the new genus 

 ThaCsoLtra, and it was included as TUUssometra alboflava in a list of the crinoids 

 of Janan published in 1908. In my memoir on the crinoids of the Indian Ocean 

 published in 1912 this species was listed as Parametra alboflava and the synonymy 

 and range were given. The significance of the range was discussed in a paper published 

 L 1915 n my report upon the unstalked crinoids of the Siboga expedition published 

 m 1918 this species was listed as Lissometra alboflava and the original reference was 



CltCd ' Genus CROTALOMETRA A. H. Clark 



Antedon (part) Be LL , Marine investigations in South Africa, vol. 4, 1905 p. 141 and following authors. 



from Japan), p^ 24 (r^ge) p. 59 On ^J^^^^T^M Atlantic and Pacific; range) ; 

 Hydrobiol. und Hyarogr. 1914 pp. 4 and follow g i ^ ^.^ ^^ . n 



Pacific), p. 19 (.m ke\;, me *->»■" » j r — Mortensen, Hand- 



Oisien Vid Medd. Dansk Naturh Foren. K0benhavn, vol. 83, 1927, p. o iuok.*- , 



No. 2, Oct. 3, 1938, p. 5. 

 843803—50 7 



