562 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



In a paper on the crinoids of the British Museum published in 1913, 1 recorded two 

 small specimens of I 'ichrometra ajra from Zanzibar. 



In the key to the species of Dichrometra in my memoir on the unstalked crinoids 

 of the Siboga Expedition published in 1918, 1 included ajra, giving the range as south- 

 eastern Africa and Madagascar. 



Dr. Hubert Lyman Clark in 1923 described Liparometra multicirra, which was 

 based upon a single specimen that had been dredged by the Pieter Faure off Durnford 

 Point, Zuluknd. He said: 



It is with no little hesitation that I put this fine new comatulid in the genus Liparometra, but as 

 P, and P 3 are of approximately equal size, it seems to me clear that it cannot be placed in either 

 Dichrometra or Lamprometra, as those genera are diagnosed by their founder, Mr. Austin H. Clark. 

 I am somewhat inclined to question the desirability of recognizing these three very closely allied 

 genera, but here again I must defer to the much wider experience of my friend. The present species 

 is, I think, quite distinct from any previously known form, as the large number of arms and cirri, 

 with their numerous segments, are quite characteristic. The few and widely spaced syzygies is also 

 s noticeable feature. 



In 1929 I recorded a small specimen of Dichrometra ajra that had been collected by 

 Dr. Cyril Crossland at Zanzibar. 



DICHROMETRA DODERLEINI (de Lorlol) 



Plate 58, Figure 271; Plate 59, Figures 272, 273 



Antedon doderleini de Loriol, Rev. Suisse zool., vol. 8, 1900, p. 93 (description; Kagoshima, Japan), 

 pi. 9, figs. 2, a-i.- — IIamann, Bronns Klassen und Ordnungen des Tier-Reichs, vol. 2, Abt. 3, 

 1907, p. 1581 (listed).— A. H. Clark, Proc. U. S. Nat. Mus., Vol. 34, 1908, p. 469 (listed; 

 collected by Dr. [Ludwig] Doderlein). 



Himerometra doderleini A. H. Clark, Smithsonian Misc. Coll., vol. 50, 1907, p. 356 (listed); Proc. 

 U. S. Nat. Mus., vol. 34, 1908, p. 317 (Japan). 



Dichrometra doderleini A. H. Clark, Crinoids of the Indian Ocean, 1912, p. 149 (synonymy; range); 

 Proc. Biol. Soc. Washington, vol. 26, 1913, p. 144 (listed), p. 179 (range in east Asia); Journ. 

 Washington Acad. Sci., vol. 5, 1915, p. 214 (southern Japanese species; range and its significance) ; 

 Unstalked crinoids of the St'bopa Exped., 1918, p. 104 (in key; range; Antedon stylifer A. H. Clark, 

 1907, included as a synonym). — Gislen, Kungl. Fysiogr. Sallsk. Handl., new ser., vol. 45, No. 

 11, 1934, p. 20; Kungl. Fysiogr. Sallsk. Lund Forh., vol. 7, No. 1, 1936, pp. 4, 5 (French Indo- 

 china), p. 6 (range), p. 14 (Pulo Condor; Misaki; notes). 



Dichrometra dofleini A. H. Clark, Journ. Washington Acad. Sci., vol. 5, 1915, p. 214 (southern 

 Japanese species; range and its significance; nomen nudum); Proc. Biol. Soc. Washington, vol. 

 29, 1916, p. 106 (description; Enoura Bay, Suruga Gulf, about 150 m.; most nearly related to 

 D. ciliata). 



Dichrometra goloi A. H. Clark, Unstalked crinoids of the Siboga Exped., 1918, p. 105 (in key; 

 range). — Gislen, Kungl. Fysiogr. Sallsk. Handl., new ser., vol. 45, No. 11, 1934, p. 33. 



Diagnostic jeatures. — The lower pinnules are slender, P 2 and P 3 being composed 

 of segments most of which are much longer than broad, becoming much elongated 

 distally; P, is 8-10 mm. long, with 15-24 segments; P 2 is 15-17 mm. long, with 28-29 

 segments; P 3 is 18-20 mm. long, with 25-29 segments; the cirri are XXX, 27-35, 

 20-30 mm. long; the longest proximal cirrus segments are about as long as broad, and 

 those in the distal half of the cirri are slightly broader than long, smooth dorsally, or 

 with small dorsal tubercles or short spines; the 20-47 arms are 100-150 mm. long. 



Description.— The cirri are about XXX, 27-28, 30 mm. long. The segments in 

 the proximal half are about as long as broad, and those in the distal half are slightly 



