7gg BULLETIN 82, UNITED STATES NATIONAL MUSEXnVI VOLUME 1 



161 (relation of certain species [as E. atlanlicus] to Decamelrocrinus [Thaumalocrinus]) . — Kiuk, 

 Proc. U.S. Nat. Mus., vol. 41, 1911, pp. 65, 66. 



Endiocrinus Paukbs, Manchester Micr. Soc. Trans, for 1890, 1891, p. 44. — Bather, Rep. British 

 Assoc, for 1898, 1899, p. 923. — Chun, Aus don Tiefen des Weltmeeres, 1900, p. 488. — Hutton, 

 Index faunae Novae-Zealandiae, 1904, p. 291. 



Pentamelrocrinus A. H. Clark, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 134 (diagnosis; type 

 species Eudiocrinus japonicus P. H. Carpenter, 1882), p. 136 (assigned to the Pentamftrocrinidae); 

 Proc. U.S. Nat. Mus., vol. 34, 1908, p. 267 (relation to Decamelrocrinus [Thaumaiocrinus]), p. 

 269 (observations on the young stages), p. 277 (revised diagnosis; list of species), p. 319 (Japa- 

 nese species); vol. 35, 1908, pp. 117, 128; fig. 9, p. 117 (arm structure), p. 126 (relation to De- 

 eamelrocrinua [Thaumalocrinus]); vol. 36, 1909, p. 363 (arm structure identical with that of 

 Thaumalocrinus, which is probably the young of this genus); vol. 38, 1910, p. 331 (includes 

 TJiaumalocrinus). — Vanet, Bull. Mus. Hist. Nat., Paris, No. 3, 1910, p. 160 (discussion). — 

 A. H. Clark, Amer. Journ. Sci., ser. 4, vol. 32, 1911, p. 129 (characteristic of the Japanese fauna; 

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

 p. 12 (represented in the Red Sea region; doubtless occurs in the southeast African region), p. 17 

 (significance of conditions in the genus in southern Japan), p. 27 (range), p. 63 (in key), p. 250 

 (synonymy; includes Thaumalocrinus); Internat. Rev. gesamt. Hydrobiol. und Hydrogr., vol. 6, 



1914, pp. 6 and following (occurs in both Atlantic and Indo-Pacific; range); Die Crinolden der 

 Antarktis, 1915, p. 121 (relation to Decamelrocrinus [Thaumalocrinus]), p. 182 (both Atlantic 

 and Indo-Pacific; range). — F. W. Clarke and Wheeler, U.S. Geol. Surv. Prof. Paper 90-L, 



1915, p. 195 (inorganic constituents of the skeleton); Prof. Paper 102, 1917, pp. 23 and foUowng 

 (same).— A. H. Clark, Unstalked crinoids of the Siboga-Exped., 1918, p. 259 (in key), p. 260 

 (key to the included species); Journ. Washington Acad. Sci., vol. 9, No. 5, 1919, p. 136 (disk 

 compared with that of Holopus); Univ. Iowa Studies in Nat. Hist., vol. 9, No. 5, 1921, p. 13 

 (West Indies and Indo-Pacific), p. 14 (in key); Smithsonian Misc. Coll., vol. 72, No. 7, 1921, 

 p. 33; The Danish /nffo^-Exped., vol. 4, No. 5, Crinoidea, 1923, p. 15, p. 44 (listed), p. 53 (in 

 key).— H. L. Clark, Ann. South African Mus., vol. 13, 1923, p. 227.— GiSLfx, Zool. Bidrag. 

 Uppsala, vol. 9, 1924, pp. 26, 30, 31, 47, 91 (articulations), p. 212 (pinnule gap).— Mortexsen, 

 Handbook of the echinoderms of the British Isles, 1927, p. 23 (in key; diagnosis). — Koehler, 

 Les ^'chinodermes des mers d'Europe, vol. 2, 1927, p. 109 (5 arms). — Gisl£n, Ark. Zool., vol. 

 19, No. 32, 1928, p. 12; Lunds Univ. Arsskr., new ser., Avd. 2, vol. 30, No. 11, 1934, p. 17; Kungl. 

 Svenska Vet.-Akad. Handl., ser. 3, vol. 17, No. 2, 1938, p. 4; Lunds Univ. Arsskr., new ser., 

 Avd. 2, vol. 34, No. 17, 1939, p. 16. — CufiNOT, in Gra.sse, Traite de zoologie, vol. 11, 1948, p. 

 71. — GiSL^N, Rep. Swedish Deep Sea Exped., vol. 2, Zool., No. 4, 1951, pp. 55, 56.— Htman, 

 The invertebrates, vol. 4, Echinodermata, 1955, p. 95. 



Endiocrinus (Penlametrocrinus) Koehler and VA>fBy, Bull. Mus. Hist. Nat., Paris, No. 1, 1910, 



pp. 26, 31. 

 Pentamenlrocrinus Gisl^n, Zool. Bidrag Uppsala, vol. 9, 1924, p. 91. 

 Penlamelrocinus Gisl^n, Vid. Medd. Nat. Foren. K0benhavn, vol. 83, 1927, p. 69. 



Diagnosis. — A genus of Pentametrocrinidae in which there are five radials from 

 each of which arises an individual arm. 



Type species. — Endiocrinus japonicus Carpenter, 1882. 



Geographical range. — From southwestern Japan southwards to New Zeahind and 

 ofT New South Wales, thence westwards to cast Africa and in the Atlantic from the 

 Canary Islands and Morocco, ofiF the west coast of Ireland and the Lesser Antilles. 



Bathymetrical range. — From 254 (?188) to 2115 meters. 



Thermal range.— From 2.50° C. to 13.33° C. 



Remarks [by A.M.C.]. — There has been some difference of opinion on the homol- 

 ogies and designations of the pinnules in this genus. Mr. Clark considers the pinnule 

 on the second brachial (only present in P. varians) to be Pi and that on the fifth brach- 

 ial (the foiu-th being the hypozygal of the first syzygy) P2. The pinnule on the 

 other side of the third brachial is then P^. Gislen in 1924 (p. 2G) also called the pin- 



