448 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



In 1937 I gave notes on the sixty-four specimens collected by the Australasian 

 Antarctic Expedition in the Aurora and Dr. Dilvvyn John reported it from the Belgica 

 collections. In the following year the same author published his report on thelarge 

 amount of material taken by the Discovery Investigations, in which he confirmed that 

 vanhoffenianus and joubini fall within the synonymy of kerguelensis. 



In 1939 Dr. John added some remarks on specimens from the type locality, Ker- 

 guelen, where a number of specimens were taken by the B.A.N.Z.A.R.E. Oddly 

 enough the species was not taken by the Scotia. 



Since then it has been recorded by the author (1950) and by Madsen (1955), 

 from the collections of the U.S. Navy and the Norwegian Antarctic Expeditions. 



Genus ANTHOMETRA A. H. Clark 



Antedon (part) BELL, National Antarctic Exped., Nat. Hist. Rep., vol. 4, Echinod., 1908, p. 4, and 

 following authors. 



Anthomelra A. H. CLARK, Smithsonian Misc. Coll., vol. 61, No. 15, 1913, p. 60 (subgenus of Pro- 

 machocrinus; no diagnosis; name used in combination with adriani); Bull. Inst. oce'anogr. 

 Monaco, No. 285, 1914, p. 3, footnote (type species Antedon adriani Bell); No. 294, 1914, p. 6 

 (spiny carination the result of the coldness of the habitat); Die CrinoTden der Antarktis, 1915, 

 pp. 122-126 (characters structural and systematic relationships; origin), p. 132 (covering plates), 

 p. 135 (synonymy; diagnosis; type species Antedon adriani Bell, 1908; range), p. 190 (further 

 discussion); Journ. Washington Acad. Sci., vol. 7, 1917, No. 5, p. 127 (referred to the Helio- 

 metrinae); No. 16, p. 507 (in key; range), p. 508 (best considered as a subgenus of Promacho- 

 crinus); Unstalked crinoids of the Siboga-Exped., 1918, p. 239 (in key; range), p. 240 (best 

 considered as a subgenus of Promachocrinus). F. W. CLARKE and WHEELER, U.S. Geol. Surv. 

 Prof. Paper 124, 1922, p. 20 (inorganic constituents of the skeleton). A. H. CLARK, The Danish 

 /n0o//-Exped., vol. 4, No. 5, Crinoidea, 1923, p. 52 (in key). GISLN, Zool. Bidrag Uppsala, 

 vol. 9, 1924, pp. 39, 288. EKMAN, Tiergeographie des Meeres, 1935, p. 307. A. H. CLARK, 

 Explorations des mers de 1'U.R.S.S., vol. 23, 1937, p. 222 (in Russian), p. 230; Sci. Rep. Australa- 

 sian Antarctic Exped., 1911-1914, ser. C, vol. 8, pt. 4, 1937, p. 6 (confined to the Antarctic), 

 p. 14. JOHN, Proc. Linn. Soc. London, sess. 149, pt. 2, 1937, p. 86; Discovery Reports, vol. 18, 

 1938, p. 130 (monotypic and confined to the Antarctic), p. 151; Rep. B.A.N.Z. Antarctic Res. 

 Exped., ser. B, vol. 4, pt. 6, 1939, p. 197. 



Promachocrinus (Anthometra) A. H. CLARK, Die Crinoiden der Antarktis, 1915, pp. 104, 106, 135. 



Diagnosis.- A genus of Heliometrinae in which the arms are narrow and strongly 

 carinate, the ossicles of the division series and lower brachials bearing high carinate 

 or spinelike processes; P] is twice as long as P 2 ; the cirri are few, long, delicate, and 

 nearly straight; the centrodorsal is conical with a large bare polar area; and there are 

 5 radials and 10 arms. 



Geographical range. Shores of the Antarctic continent, the Graham Land peninsula, 

 and the South Shetland Islands. 



Bathymetrical range. From 130(?100) to 914 meters. 



Thermal rangeFrom -1.85 to +1.38 C. 



History. The single species in this genus was originally described as an Antedon. 

 In 1913 the name Anthometra, treated as a subgenus of PromachocrinitS, was used for 

 it, without any diagnosis or explanation. In 1914 the type species of Anthometra 

 was formally given as Antedon adriani. In 1915 a diagnosis was published. Since 

 1918 (Mortensen) Anthometra has been treated as a distinct genus. 



