A MONOGRAPH OF THE EXISTING CRINOIDS 227 



Dr. Sixten Bock's Expedition to Japan 1914; station 56; Bonin Islands, east of 

 the Channel; 210 meters; shells and sand; August 15, 1914 [Gislen, 1922, 1924, 1927 

 1934]. 



Geographical range. — From southwestern Japan to the Bonin Islands. 



Bathymetrical range. — From 165 to 210 meters. 



History. — This species was described in 1907 under the name of Antedon garrettiana 

 from a single specimen from Albatross station 4894. Later in the same year it was 

 transferred to the new genus Charitometra. In 1908 Charitometra garrettiana was listed 

 as a Japanese species. In 1909 garrettiana was made the type of the new genus Chloro- 

 metra. In my memoir on the crinoids of the Indian Ocean published in 1912 Chloro- 

 metra garrettiana was listed and the synonymy and range were given. In 1915 it was 

 again listed as a Japanese species and the range and its significance were discussed. 

 In my memoir on the unstalked crinoids of the Siboga Expedition published in 1918 

 Chlorometra garrettiana was included, and I gave the synonymy and range. 



Diodontometra bocki was described and figured by Prof. Torsten Gislen in 1922 

 from a single specimen collected by Dr. Sixten Bock in the Bonin Islands in 1914. 

 In 1924 Gislen described and figured the syzygies and the pinnule articulations. In 

 1927 he recorded and gave notes on two additional specimens that had been dredged 

 by Dr. Th. Mortensen off southwestern Japan, figuring certain details of the structure. 

 In 1934 he listed Diodontometra bocki as representing a special type of arm division. 



Genus GLYPTOMETRA A. H. Clark 



Antedon (part) P. H. Carpenter, Pop. Sci. Rev., vol. 4, No. 15, 18S0, p. 194, and following authors. 



Charitometra (part) A. H. Clark, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 361. 



Glyptometra A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 18 (diagnosis; genotype 

 Antedon tuberosa P. H. Carpenter, 1888), p. 83 (ornamentation compared with that of Pachy- 

 lometra investigatoris) ; Proc. U. S. Nat. Mus., vol. 40, 1911, p. 10 (represented in the West Indies 

 by Crinometra) ; Crinoids of the Indian Ocean, 1912, p. 9 (absent from Australia), p. 10 (occurs 

 at the Hawaiian Islands [Pachylometra lateralis]), p. 11 (absent from the west coast of the Malay 

 Peninsula, the Andamans, and from farther west), p. 13 corresponds in part to the West Indian 

 Crinometra), p. 24 (range; for zoogeographical purposes may well be considered as one with 

 Pachylometra and Crinometra), p. 60 (in key), p. 224 (original reference; type); Internat. Rev. 

 gesamt. Hydrobiol. und Hydrogr., 1914, pp. 4 and following (in part represents Crinometra of 

 the Atlantic; range); Die Crinoiden der Antarktis, 1915, p. 125 (certain species show the charac- 

 teristic features of Anthometra adriani), p. 181 (range; represents, in part, Crinometra of the 

 Atlantic) ; Unstalked crinoids of the Siboga-Exped., 1918, p. 173 (in key; range), p. 190. — Gislen, 

 Vidensk. Medd. Dansk Nat. Foren., vol. 83, 1927, p. 35; Kungl. Fysiogr. Sallsk. Handl., new 

 ser., vol. 45, No. 11, 1934, p. 20. 



Pachylometra A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 20 (diagnosis; genotype 

 Antedon distincta P. H. Carpenter, 1888); Vid. Medd. Nat. Foren. K0benhavn, 1909, p. 147 

 (the species of this genus agree in the variation of the IIBr series with the species of the West 

 Indian Crinometra) ; Proc. U. S. Nat. Mus., vol. 40, 1911, p. 10 (represented in the West Indies by 

 Crinometra), p. 13 (common to southeast Africa and the Bay of Bengal, but not occurring in the 

 Arabian Sea); Crinoids of the Indian Ocean, 1912, p. 11 (occurs both east and west of Ceylon), 

 p. 12 (represented in the Red Sea and in the southeast African regions), p. 13 (corresponds in part 

 to the West Indian Crinometra) , p. 24 (range; for zoogeographic purposes may well be considered 

 as one with Glyptometra and Crinometra), p. 60 (in key), p. 215 (original reference; type). — 

 Hartlaub, Mem. Mus. Comp. Zool., vol. 27, No. 4, 1912, p. 286 (discussion). — A. H. Clark, 

 Internat. Rev. Gesamt. Hydrobiol. und Hydrogr., 1914, pp. 4 and following (in part represents 

 the Atlantic Crinometra; range); Die Crinoiden der Antarktis, 1915, p. 125 (certain species show 



