PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 449 



ANTHOMETRA ADRIANI (Bell)* 



[See vol. 1, pt. 2, fig. 938, p. 549] 



Antedon adriani Bell, National Antarctic Exped., Xat. Hist., vol. 4, Echinod., 1908, p. 4 (descrip- 

 tion; Discovery, Winter Quarters, down to 130 fms., and off Mts. Erebus and Terror, 500 fms.), 

 pi. 2. — VON Stdmmer-Tka0nfels, National Antarctic Exped., Nat. Hist, vol. 4, Myzostomidae, 

 1908, pp. 2, 7 (myzostomes). — A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 17, 

 footnote (not identifiable from the description; remarks); Smitlisonian Misc. Coll., vol. Gl, No. 15, 

 1913, p. 80 (of Bell, 1Q08 = A7ilho7netra adriani + Solanometra antarctica [Promnchocrinus ker- 

 guelensis]). — Boulenger, British Antarctic (Terra Nova) Exped. 1910, Nat. Hist. Rep., Zool., 

 vol. 2, No. 6, Jan. 22, 1916, pp. 135, 136 (myzostomes). — Bell, British Antarctic (T'erra Nova) 

 Exped. 1910, Nat. Hist. Rep., Zool, vol. 4, No. 1, 1917, p. 2 (Terra Nova stas. 194, 314, 348). 



Anthometra adriani A. H. Clark, Smithsonian Misc. Coll., vol. 61, No. 15, 1913, p. 60 (published 

 reference to specimens in the B. M.; Discovery, Winter Quarters, 124 and 130 fms.; same. No. 10 

 Hole, and No. 10 Hole, 127 fms.; Mts. Erebus and Terror; characters). — F. W. Clarke and 

 Wheeler, U.S. Geol. Surv. Prof. Paper 90-D, 1914, pp. 34 and following (inorganic constituents of 

 the skeleton). — A. H. Clark, Journ. Washington Acad. Sci., vol. 5, 1915, No. 3, p. 81 (Antarctic; 

 range); Die Crinolden der Antarktis, 1915, p. 10" (in key to Antarctic crinoids),p. 122 (characters), 

 p. 168 (a shallow water antarctic species; circumpolar; range), p. 169 (relationships), p. 192 

 (further discussion), p. 207 (complete analj'sis of the skeleton by F. W. Clarke). — F. W. Clarke 

 and Wheeler, U.S. Geol. Surv. Prof. Paper 102, 1917, pp. 21 and following (analysis of the 

 skeleton). — Morten'sen, Wiss. Ergeb. schwed. SUdpoIar-Exped., 1901-1903, vol. 4, Lief. 8, 1918, 

 p. 18 {Antarctic sta. 8). — F. W. Clarke and Wheeler, U. S. Geol. Surv. Prof. Paper 124, 1922, 

 p. 17 (inorganic constituents of the skeleton). — Gisl£n, Zool. Bidrag Uppsala, vol. 9, 1924, pp. 

 194, 288; fig. 342, p. 281.— Mortensen, Ark. Zool., vol. 17, No. 31, 1925, p. 2 (Ross Sea; 550 

 meters). — Gisl£n, Ark. Zool., vol. 19, No. 32, 1928, p. 11 (proximal pinnules with some ex-panded 

 segments so that the species is transitory to the Isometrinae) . — A. H. Clark, Journ. Linn. Soc. 

 (Zool.), vol. 36, 1929, p. 662 (T'erra Nova station). — Grieg, Bergens Mus. Aarb., 1929, No. 3, 

 p. 4 (specimens collected from harpoon line). — \. H. Clark, Sci. Rep. Australasian Antarctic 

 Ex-ped., 1911-1914, ser. C, vol. 8, pt. 4, 1937, pp. 14-16 (Aurora stations 1, 2, 3, 8, 9, 12; distribution; 

 color in Ufe; description). — John, Res. Voy. Bslgica, 1897-1899, Crinoidea, 1937, p. 10 (proc- 

 esses on the lower brachials cleft); Proc. Linn. Soo. London, sess. 149, pt. 2, 1937, p. 85; Discovery 

 Reports, vol. 18, 1933, p. 123 (listed), p. 124 (taken with M(/2os(omuTO), p. 129 (in distribution table), 

 p. 131(in key), p. 151 (st.ations; notes), p. 152 (Myzostomum on disk); fig. 5, p. 151, pi. 3, fig. 4; 

 Rep. B.A.N.Z. Antarctic Res. Exped. 1929-1931, ser. B., vol. 4, pt. 6, 1939, p. 191 (listed), pp. 

 197-198 (stations; range of size). — Vanet and John, Sci. Res. Voy. Scotia, 1939, p. 668 (Scotia 

 station). — Vinogradov, Mem. Sears Found. Mar. Res., vol. 2, 1953, p. 256 (skeletal com- 

 position). — Hyman, The invertebrates, vol. 4, Echinodermata, 1955, p. 113. — Tortonese, 

 Ann. Mus. Civ. Stor. Nat. Genova, vol. 68, 1956, p. 182. 



Promachocrinus (Anthometra) adriani \. H. Clark, Die Crinolden der Antarktis, 1915, p. 104 (in 

 Gauss collection), p. 106 (recorded as Antedon adriani from the Discovery collection), p. 135 (syn- 

 onymy; detailed description of Gauss specimens; Gauss station, 350-400 meters; r&um^ of pre- 

 vious records), pi. 6, figs 1-5, pi. 7, figs. 1-5. 



Promachocrinus adriani Ekman, Tiergeographie des Meeres, 1935, p. 319. 



Diagnostic features. — The cirri number up to XC with a maximum length of 

 100 mm. and at the most 93 segments; the arms are up to 250 mm. long but usually 

 about 150 mm., with a prominent dorsal keel which may be serrated or notched or in 

 the form of a series of tubercles; Pi is also carinate; it is up to 22 mm. long, with 59 

 segments; P2 is much shorter, about 12 mm. long, with only about 18 to 20 segments. 



Description. — The centrodorsal is usually more or less sharply conical, more rarely 

 almost hemispherical, with a relatively large bare polar area. The cirrus sockets, which 



*See also Addenda (p. 837) under 1963. 



