348 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Proc. U. S. Nat. Mus., vol. 34, 1908, p. 211 (referred to the Thalassometridae), p. 212 (occurs 

 in the West Indies, Japan, and the Hawaiian Islands), p. 275 (proximal ornamentation); vol. 

 35, 1908, p. 120 (arm structure), fig. 19, p. 120; Amer. Nat., vol. 42, No. 500, 1908, p. 542 (ex- 

 cluding the aculeata, hepburniana, basicurva, and tuberosa groups, a characteristic oceanic genus); 

 No. 503, p. 723 (range; habitat); Geogr. Journ., vol. 32, No. 6, 1908, p. 603 (oceanic, excluding 

 the aculeata, hepburniana, basicurva, and tuberosa groups) ; Proc. Biol. Soc. Washington, vol. 22, 

 1909, p. 1 (revision), p. 20 (list of included species as restricted). — Hartlaub, Mem. Mus. 

 Comp. Zool., vol. 27, No. 4, 1912, p. 286 (constitution; discussion). — A. H. Clark, Crinoids of 

 the Indian Ocean, 1912, p. 9 (absent from Australia), p. 10 (absent from Japan), p. 11 (absent 

 from the west coast of the Malay Peninsula, the Andamans, and farther west), p. 25 (range), 

 p. 60 (in key), p. 226 (original reference; type); Unstalked crinoids of the Siboga-Exped., 1918, 

 p. 172 (in key; range), p. 191 (key to the included species). — Gislen, Nova Acta Reg. Soc. Sci. 

 Upsaliensis, ser. 4, vol. 5, No. 6, 1922, p. 7 (relation to Diodontometra); Ark. Zool., vol. 19, No. 

 32, Feb. 20, 1928, p. 9; Kungl. Fysiogr. Sallsk. Handl., new ser., vol. 45, No. 11, 1934, p. 18; 

 Kungl. Svensk. Vet.-Akad. Handl., ser. 3, vol. 17, No. 2, Oct. 3, 1938, p. 20. 



Diagnosis. — The genital pinnules have the third and fourth or fourth and fifth 

 segments greatly expanded, the abruptly narrower portion of the pinnules beyond 

 being shorter than the expanded portion; the basal portion of the animal is compressed, 

 the two sides in lateral view making an angle of about 45° with each other; the IBr 

 series and lower brachials are in close lateral contact and are sharply and broadly 

 flattened against their neighbors; the 10 arms are 90-100 mm. long. 



Geographical range. — From Fiji to the Kermadec Islands. 



Bathyrnetrical range. — One definite record, 1,152 meters. 



Thermal range. — One record, 4.17° C. 



History. — The genus Charitornetra was established in 1907 to include all the species 

 of the old genus Antedon now regarded as falling within the family Charitometridae 

 except for two that were assigned to the genus Poecilometra. It also included two 

 species, compressa and orion, which in 1909 were removed to the new genus Parametra 

 and transferred to the family Thalassometridae. 



In 1909 Charitornetra was restricted to its present significance through the removal 

 of most of the included species to the new genera Oiyptometra, Strotometra, Pachyl- 

 ometra, Chlorometra, and Crinometra. 



KEY TO THE SPECIES IN THE GENUS CHARITOMETRA 



a 1 . Brachials from the fourth onward with prominently thickened, everted, and beaded or tuber- 

 culated distal edges, this feature gradually dying away after the brachials become triangular; 

 arms about 100 mm. long (Kermadec Islands; 1,152 meters) basicurva (p. 348) 



a?. Brachials with unmodified distal ends, the arms appearing quite smooth (Kermadec Islands 

 and Fiji; 1,152 meters) incisa (p. 352) 



CHARITOMETRA BASICURVA (P. H. Carpenter) 



[See vol. 1, pt. 1, figs. 279, p. 260, 495, p. 367; pt. 2, pi. 3, figs. 990, 991, pi. 26, fig. 1160, pi. 27, fig. 



1167.] 



Antedon basicurva von Graff, Challenger Reports, Zoology, vol. 10, pt. 27, 1884, pp. 17, 70, 73 (my- 

 zostomes; Challenger station 170; nomen nudum). — P. H. Carpenter, Challenger Reports, Zoology, 

 vol. 11, pt. 32, 1884, p. 84; pi. 54, fig. 9; pi. 55, fig. 7. — von Graff, Challenger Reports, Narrative, 

 vol. 1, pt. 1, 1885, p. 316 (myzostomes). — P. H. Carpenter, Challenger Reports, Zoology, vol. 

 26, pt. 60, 1888, p. 120 (description; Challenger stations 170A, ?175), pi. 2, figs. 2, a-d, pi. 21, 

 fig. 3, pi. 22, figs. 3, 4, text fig. 2, A, B, p. 100, duplicated on p. 122.— Braun, Centralbl. Bak- 

 teriol. und Parasitenkunde, vol. 3, 1888, p. 210 (myzostomes; after von Graff). — P. H. Car- 

 penter, Journ. Linn. Soc. (Zool.), vol. 24, 1891, p. 67 (compared with (A. [Stiremetra] lusitan- 



