786 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



161 (relation of certain species [as E. atlanticvs] to Decametrocrinus [Thaumatocrinus]) . KIRK, 

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



Endiocrinus PARKES, Manchester Micr. Soc. Trans, for 1890, 1891, p. 44. BATHER, Rep. British 

 Assoc. for 1898, 1899, p. 923. CHUN, Aus den Tiefen des Weltmeeres, 1900, p. 488. BUTTON, 

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



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

 species Eudiocrinusjaponicus P. H. Carpenter, 1882), p. 136 (assigned to the Pentametroerinidae) ; 

 Proc. U.S. Nat. Mus., vol. 34, 1908, p. 267 (relation to Decametrocrinus [Thaumatocrinus]), 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- 

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

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

 Thaumatocrinus). 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 Thaumatocrinus); Internat. Rev. gesamt. Hydrobiol. und Hydrogr., vol. 6, 



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

 Antarktis, 1915, p. 121 (relation to Decametrocrinus [Thaumatocrinus]), 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 following 

 (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-Paeific), p. 14 (in key); Smithsonian Misc. Coll., vol. 72, No. 7, 1921, 

 p. 33; The Danish Ingolf-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. GISLN, Zool. Bidrag. 

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

 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). GISLEN, 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. CUENOT, in Grass<5, Trait< de zoologie, vol. 11, 1948, p. 

 71. GISLEN, Rep. Swedish Deep Sea Exped., vol. 2, Zool., No. 4, 1951, pp. 55, 56. HTMAN, 

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



Eudiocrinus (Pentametrocrinus) KOEHLER and VANET, Bull. Mus. Hist. Nat., Paris, No. 1, 1910, 



pp. 26, 31. 



Pentamentrocrinus GISLEN, Zool. Bidrag Uppsala, vol. 9, 1924, p. 91. 

 Pentametrocinus GISLEN, Vid. Medd. Nat. Foren. K0benhavn, vol. 83, 1927, p. 69. 



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

 each of which arises an individual arm. 



Type species. Eudiocrinusjaponicus Carpenter, 1882. 



Geographical range. From southwestern Japan southwards to New Zealand and 

 off New South Wales, thence westwards to east Africa and in the Atlantic from the 

 Canary Islands and Morocco, off 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 Pt and that on the fifth brach- 

 ial (the fourth being the hypozygal of the first syzygy) P 2 . The pinnule on the 

 other side of the third brachial is then P ft . Gislen in 1924 (p. 26) also called the pin- 



