98 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



supplementary paper on the crinoids of the Hamburg Southwest Australian Expedi- 

 tion published in 1913 I again recorded and described the specimen from Shark Bay 

 in the Hamburg Museum. 



Dr. August Reichensperger in 1913 recorded and described two specimens from 

 the Aru Islands that had been collected by Dr. H. Merton, and at the same tune 

 published a detailed description of a new species, which he called Zygometra mertoni. 



In a paper on the crinoids collected by the Endeavour off the coast of Western 

 Australia published in 1914, I remarked that from an examination of the types in 

 London I believed Antedon multiradiata to be based upon specimens of Antedon 

 microdiscus which had not attained full development, and said further that I would 

 now refer to Zygometra microdiscus the specimens I had recorded from northwestern 

 Australia and from Lewis Island in the Dampier Archipelago. 



In 1915 Prof. Frank W. Clarke and W. C. Wheeler, of the U. S. Geological Survey, 

 published an analysis of the inorganic constituents of the skeleton of this species, 

 their material consisting of fragments of the specimens collected by the Siboga at the 

 Aru Islands. 



In 1916 Dr. Hubert Lyman Clark recorded and gave notes upon a specimen 

 dredged by the Endeavour off Port Curtis, and in the same year Dr. Robert Hartmeyer 

 again listed the specimens hi the Berlin Museum and gave their catalogue numbers. 



In my report upon the crinoids of the Siboga Expedition published in 1 9 1 8 , 1 recorded 

 and gave notes upon a series of 14 specimens collected in the Aru Islands. From the 

 characters presented by young individuals in this series it seemed clear that Reichen- 

 sperger's Zygometra mertoni is merely the young of Z. microdiscus, and the former was 

 therefore placed among the synonyms of the latter. The analysis of the inorganic 

 constituents of the skeleton of this species was republished in an appendix to the 

 Siboga report. 



Dr. Torsten Gisl6n in 1919 recorded and described a specimen from Mjoberg's 

 station 13 and at the same tune suggested that Bell's Antedon elegans should be re- 

 garded as merely a variety of microdiscus. 



Dr. Hubert Lyman Clark in 1921 published a general discussion of this species 

 based on published records, and in 1924 Dr. Gislen described in detail the pinnule 

 articulations. 



In 1929 1 recorded a specimen from Baudin Island. 



In 1938 Dr. H. L. Clark recorded and gave notes on 25 specimens collected by 

 himself at Broome and Lagrange Bay, Western Australia, in 1929 and 1932. 



ZYGOMETRA ELEGANS (Bell) 



PLATE 2, FIGURE 5; PLATE 3, FIGURES 7, 8; PLATE 4, FIGURES 9-12 

 [See also vol. 1, pt. 2, fig. 710 (disk), p. 346.] 



Antedon elegans BELL, Proc. Zool. Soc. London, 1882, p. 534 (specific formula) .P. H. CARPENTER, 

 Proc. Zool. Soc. London, 1882 (1883), p. 746 (specific formula). BELL, Report Zool. Coll. 

 H.M.S. Alert, 1884, p. 155 (specific formula), p. 162 (description; Port Molle; Thursday Island), 

 pi. 13, figs. B, Ba. P. H. CARPENTER, Challenger Reports, Zoology, vol. 26, pt. 60, 1888, pp. 23, 

 31, 48, 52, 53, 55, 56, 90, 94, 96, 97, 130 (discussion), 264-266 (identity with jZueiuans), 276, 362, 

 366, 367, 375, pi. 8. figs. 1, 2; Journ. Linn. Soc. (Zool.), vol. 21, 1889, p. 305 (discussion, but not 

 the specimens from Mergui or the Philippines, which are Z. comata). DODERLEIN, Denkschr. 

 med.-nat. Ges. Jena, vol. 8, pt. 5, 1898, p. 475 (Thursday Island; notes), pi. 36, fig. 1. 



