A MONOGRAPH OF THE EXISTING CRINOIDS 385 



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

 inseTted favopurpurea in a key to the species of the genus Pectinomeira and gave the 

 range. 



Prof. Torsten Gisldn in 1922 recorded and gave detailed notes on a nimiber of 

 specimens from Prof. Sixtcn Bock's stations 34, 35, and 36. In 1924 he discussed 

 the structure of this species in great detail. In 1927 he recorded and gave notes on 

 additional specimens from Dr. Th. Mortcnsen's station 26, and in 1934 he described 

 the type of arm division and its significance. 



Genus CALOMETRA A. H. Clark 



Anfedon (part) P. H. Carpenter, Challenger Reports, Zooiogj', vol. 26, pt. 60, 1888, p. 134, and 

 following authors. 



Calometra A. H. Clark, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 362 (diagnosis; genotype 

 Antedon caUista A. H. Clark, 1907) ; Bull. Mus. Comp. Zool., vol. 51, No. 8, 1908, p. 245 (same) ; 

 Proc. Biol. Soc. Washington, vol. 21, 1908, p. 125 (pinnules sharply triangular, not cylindrical), 

 p. 135 (referred to Tropiometridae) ; Proc. U. S. Nat. Mus.. vol. 34, 1908, p. 211 (referred to 

 Tropiometridae), p. 212 (occurs in Japan); Amer. Nat., vol. 42, No. 500, 1908, p. 541 (only 

 known from Indo-Pacific-Japane.se area); Geogr. Journ., vol. 32, No. 6, 1908, p. 602 (same); 

 Proc. U. S. Nat. Mus., vol. 36, 1909, p. 365 (extraordinary development of side and covering 

 plates); Vid. Medd. Naturh. Foren. K0bcnhavn, 1909, p. 182 (character of the articular faces 

 of the radials), p. 193 (probably occurs at Singapore, though not yet discovered there); Amer. 

 Journ. Sci., ser. 4, vol. 32, 1911, p. 129 (characteristic of the Japanese fauna; significance); 

 Mem. Australian Mus., vol. 4, 1911, p. 728 (species of this genus distributed among 4 genera 

 [not named] w^hich collectively form the new family Calometridae) ; Proc. Biol. Soc. Washington, 

 vol. 25, 1912, p. 82 (Pi compared with that of Slrotomelra priamus) ; Crinoids of the Indian Ocean, 

 1912, p. 17 (only known from southern Japan), p. 23 (confined to southern Japan; depth), p. 42 

 (removed from the Tropiometridae, created a special family, and its species distributed among 

 4 genera), p. 58 (in key), p. 177 (original reference; type). — Gisl6n, Nova Acta Reg. Soc. Sci. 

 Upsaliensis, ser. 4, vol. 5, No. 6, 1922, p. 9 (relationship to Neomelra), pp. 95, 96; Kungl. Fysiogr. 

 Sallsk. Handl., new ser., vol. 45, No. 11, 1934, pp. 18, 20. 



Gephyrometra (part) A. H. Clark, Crinoids of the Indian Ocean, 1912, pp. 10, 23, 33. 



Diagnosis. — A genus of Calometridae in which the arms are 10-15 in number, the 

 IIBr scries being 2; the radials are not extended upward interradially, or if they are 

 the extensions are narrow and the bases of the IBri meet over them; the division series 

 may be separated, or more or less in contact through lateral extensions of the ossicles; 

 and P2 and the following pimiulcs arc short, subequal in length. 



Geographical range. — From the Kei Islands to the Moluccas and northward to 

 southern Japan as far east as Sagami Bay. 



Bathymetrical range. — From 100 to 439 meters. 



Thermal range.— From 11.61° C. to 15.89° C. 



History. — The first known species of this genus was described as an Antedon by 

 Dr. P. H. Carpenter in 1888. Carpenter placed it in his Acoela group together with 

 Antedon (Poecilometra) acoela, belonging to the family Charitometridae, though he 

 said that the two differ "in nearly all the characters of the cirri, arms, and pimiulcs." 



In 1907 I established the genus Calometra with Antedon callistu A. H. Clark, 1907, 

 as the genotype. This genus was given its present significance in my memoir on the 

 crinoids of the Indian Ocean pubUshed in 1912 by the creation of the new genera 

 Pectinometra, Neometra, and Oephyrometra to include species previously assigned to 

 Calom£tra. 



