PART 5 A. MONOGRAPH OF THE EXISTING CRINOIDS 419 



In the following yea,r, 1938, Professor A. M. Djakonov published a report on the 

 echinoderms of Siaukhu Bay on the Sea of Japan. He recorded maxima from two 

 stations, at both of which it occurred in large quantities in association with Ophiura 

 sarsi. 



In 1955 the distribution of maxima was outlined by Uschakov in a comprehensive 

 work on the marine fauna of the far eastern seas of the U.S.S.R. Finally in 1957 

 Baranova commented on the absence of maxima from the Bering Sea. 



Genus SOLANOMETRA A. H. Clark 



Antedon (part) P. H. CARPENTER, Quart. Journ. Geol. Soc., vol. 36, 1880, p. 47, and following authors. 



Heliomelra (part) A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 351. 



Solanometra A. H. CLARK, Amer. Journ. Sci., ser. 4, vol. 32, 1911, p. 128 (nomen nudum; the remarks 

 refer to Florometra) , p. 129 (characteristic antarctic genus; significance); Mem. Australian Mus., 

 vol. 4, 1911, p. 727 (type species Antedon antarctica P. H. Carpenter, 1880; directly derived 

 from Cydometra; Promachocrinus a meristic variation of this genus; route followed by this genus 

 to the antarctic and thence [Florometra] to the Bering Sea, etc.) ; Crinoids of the Indian Ocean, 



1912, p. 5 (derived from the East Indian Cyclomelra; an antarctic genus), p. 6 (large number of 

 species in the genus [including Florometra]), p. 26 (closely allied to Cydometra). VANET, Bull. 

 Mus. Hist. Nat., Paris, No. 2, 1912, p. 33 (resemblance of the young of Heliomelra glacialis to 

 the species of this genus [including Florometra]) ; in Koehler, Bull. Mus. Hist. Nat., Paris, vol. 19, 



1913, p. 34. A. H. CLARK, Smithsonian Misc. Coll., vol. 61, No. 15, 1913, p. 61 (subgenus of 

 Promachocrinus; restricted by the separation of Floromelra from it) ; Bull. Inst. Oeganogr., Monaco, 

 No. 285, 1914, p. 3 (type Anledon antarclica) ; No. 294, 1914, p. 6 (shortness of the brachials 

 due to the coldness of the habitat); Die Crinoiden der Antarktis, 1915, pp. 122-126 (structural 

 and systematic relationships; characters; origin), p. 132 (covering plates), p. 134 (synonymy; 

 diagnosis; range), p. 190 (further discussion); Journ. Washington Acad. Sci., vol. 7, 1917, No. 5, 

 p. 127 (referred to the Heliometrinae) ; No. 16, p. 508 (in key; range; best considered as a sub- 

 genus of Promachocrinus); The Danish Ingolf-Exped., vol. 4, No. 5, Crinoidea, 1923, p. 52 (in 

 key). GISLEN, Ark. Zool., vol. 19, No. 32, 1928, p. 11. TORTONESE, Natura, Milano, vol. 

 24, 1933, p. 165. A. H. CLARK, Explorations des mers de 1'U.R.S.S., vol. 23, 1937, p. 222 (in 

 Russian), p. 230; Sci. Rep. Australasian Antarctic Exped., 1911-1914, ser. C, vol. 8, pt. 4, 1937, 

 p. 6 (limited to Antarctic), p. 9. 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. 152. 

 GISLEN, Kungl. Svenska Vet.-Akad. Handl., ser. 3, vol. 17, No. 2, 1938, p. 21. 



Promachocrinus (Solanometra) A. H. CLARK, Die Crinoiden der Antarktis, 1915, pp. 105, 106, 135. 



Diagnosis. A genus of Heliometrinae in which the arms are never carinate; the 

 brachials are very short, the longest twice as broad as long, with finely serrate distal 

 ends; the segments of the middle and distal pinnules, except the terminal, are about as 

 long as broad; the longest segments of the longest cirri are never more than twice as 

 long as broad and in most of the cirri the segments are about as long as broad; and there 

 are 5 radials and 10 arms. 



Type species. Antedon antarctica P. H. Carpenter, 1880. 



Geographical range. Only known from the vicinity of Heard Island, and (?) from 

 off Adelie Land in the Antarctic Continent. 



Bathy metrical range. From 137 to 645 meters. 



Thermal range. From -1.84 to +1.78 C. 



Remarks [by A.M.C.]. As noted on p. 340 I think that Florometra mawsoni may 

 prove to be congeneric with Solanometra antarctica. It appears to be intermediate in 

 many characters between the type species of the two genera. 



