698 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



Albatross station 4230; in the vicinity of Naha Bay, Behm Canal, southeastern 

 Alaska; Indian Point bearing N. 70 E., 5 miles distant; 197-438 meters; temperature 

 5.78 C.; rocky bottom; July 7, 1903 (1, U.S.N.M., 35823). 



Geographical range. Southeastern Bering Sea and the Gulf of Alaska. 



Bathymetrical range. From 291 (?197) to 1270 meters; the average of 7 records is 

 630 meters. 



Thermal range. From 2.67 C. to 5.78 C.; the average of 6 records is 2.99 C. 



Remarks. An examination in detail of the numerous lots of Florometra asperrima 

 in the collection of the National Museum revealed a number of small specimens which 

 previously had been overlooked as the young of that species, but which possessed fully 

 developed gonads. These were segregated and laid aside for future study. In 1936 

 they were described under the specific name alascana, which was made the type species 

 of the new genus Retiometra. 



Genus HATHROMETRA A. H. Clark 



Asterias (part) RBTZIUS, Kongl. Svenska Vet.-Akad. Handl., vol. 4, 1783, p. 241. 



Comatula (part) LAMARCK, Histoire naturelle des animaux sans vertebres, vol. 2, 1816, p. 530, and 

 following authors. 



Alectro SAT, Journ. Acad. Nat. Sei. Philadelphia, vol. 5, 1825, pt. 1, p. 153 (editorial error). 



Alecto (part) DUBEN and KOBEN, Kongl. Svenska Vet.-Akad. Handl. for 1844, 1846, p. 231, 

 and following authors. 



Comatula (Alecto) (part) J. MtJLLER, Abh. Preuss. Akad. Wiss. for 1847, 1849, p. 254. 



Antedon (part) NORMAN, Ann. Mag. Nat. Hist., ser. 3, vol. 15, 1865, p. 103, and following authors. 



Comatulus LINVILLE and KELLY, A text book in general zoology, 1906, p. 247 (editorial error). 



Hathromelra A. H. CLARK, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 130 (type species Alectro 

 dentata Say, 1825), p. 136 (referred to the Antedonidae) ; Proc. U.S. Nat. Mus., vol. 34, 1908, p. 

 211 (referred to the Antedonidae, restricted); Amer. Nat., vol. 42, No. 500, 1908, p. 542 (belongs 

 to the Polar-Pacific fauna; confined to north) ; No. 503, p. 724 (color) ; Geogr. Journ., vol. 32, 

 1908, No. 6, p. 603 (occurs in Arctic section of the Polar-Pacific region) ; Proc. Biol. Soc. Washing- 

 ton, vol. 22, 1909, p. 84 (centrodorsal compared with that of Eumetra indica) , p. 176 (referred to 

 Heliometrinae) ; Proc. U.S. Nat. Mus., vol. 36, 1909, pp. 362, 366 (cirri resemble those of Coma- 

 tilia iridometriformis) ; vol. 40, 1911, p. 652 (no infrabasals in young) ; Mem. Australian Mus., vol. 

 4, 1911, p. 727 (route by which this genus reached the Arctic and north Atlantic from the Bay of 

 Bengal; directly descended from Trichometra) ; Proc. U.S. Nat. Mus., vol. 43, 1912, p. 406 (general 

 discussion) ; Crinoids of the Indian Ocean, 1912, p. 6 (origin), p. 26 (closely allied to Trichometra) ; 

 Fisheries, Ireland, Sci. Invest., 1913, pt. 4, p. 3 (relation to Trichometra; discussion) ; Internat. 

 Rev. gesamt. Hydrobiol. und Hydrogr., vol. 6, 1914, p. 6 (range; discussion); Die Crinoiden der 

 Antarktis, 1915, p. 143 (synonymy; diagnosis; range), p. 168 (range), p. 182 (range; represented 

 in Indo-Pacific by Trichometra, in part) ; Smithsonian Misc. Coll., vol. 65, No. 10, 1915, p. 23 (stem 

 of young compared with that of Apiocrinidae) ; Journ. Washington Acad. Sci., vol. 5, 1915, No. 

 3, p. 77 (common to Atlantic and Arctic, and Atlantic and Antarctic) ; vol. 7, 1917, No. 5, p. 128 

 (referred to Bathymetrinae) ; No. 16, p. 511 (in key; range). F. W. CLARKE and WHEELER, U.S. 

 Geol. Surv. Prof. Paper No. 102, 1917, p. 23 (percentage of magnesium carbonate); No. 124, 

 1922, p. 20 (same). A. H. CLARK, Unstalked crinoids of the Siboga-'Exped., 1918, p. 245 (in key; 

 range), p. 246 (included species); Smithsonian Misc. Coll., vol. 72, 1921, No. 7, p. 28 (color); The 

 Danish Ingolf-Exped., vol. 4, No. 5, Crinoidea, 1923, pp. 8, 42 (range), p. 53 (in key), p. 56 (key 

 to species). GISLEN, Ark. Zool., vol. 15, No. 23, 1923, pp. 8, 9, 14, 15 (comparison with Polio- 

 metro), p. 16 (in key), pp. 23-30 (detailed discussion); Zool. Bidrag Uppsala, vol. 9, 1924, p. 

 275 (ambulacral ciliary currents). MORTENSEN, Danmarks Fauna, No. 27, 1924, p. 21 (in key; 

 diagnosis); Handbook of the echinoderms of the British Isles, 1927, p. 27 (in key), pp. 38, 39 

 (diagnosis). KOEHLER, Les echinodermes des mers d'Europe, vol. 2, 1927, p. 116 (in key), p. 

 126 (diagnosis; key to species). GISLEN, Vid. Medd. Nat. Foren. K0benhavn, vol. 83, 1927, p. 

 6. EKMAN, Tiergeographie des Meeres, 1935, p. 378. ELIAS DA COSTA, Chaves dicot6micas 



