354 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Braun, 1888; Hartlaub, 1895; Lang, 1896; Huttou, 1904; A. H. Clark, 1907, 1909, 

 1912, 1913, 1918; Hamann, 1907; Gislen, 1928] (1, M. C. Z., 269). 



Challenger station 174 (B, C, or D); near Kandavu, Fiji (lat. [about] 1906' S., long, 

 [about] 17818' E.); 466, 1,115, or 384 meters; bottom temperature (at 1,115 meters) 

 3.88 C.; coral mud; August 3, 1874 [von Graff, 1884, 1885; P. H. Carpenter, 1888; 

 Braun, 1888; Hartlaub, 1895; A. H. Clark, 1907, 1909, 1912, 1913, 1918; Hamann, 

 1907; Gisleii, 1928J (3, B. M., labeled as from both stations). 



Geographical range. From the Kermadec Islands to Fiji. 



Bathymetrical range. One definite record, 1,152 meters. 



Thermal range. One definite record, 4.17 C. 



History. Antedon incisa was first mentioned as a nomen nudum by Prof. Ludwig 

 von Graff in his account of the myzostomes of the Challenger Expedition published in 

 1884; he gave as the localities stations 170 and 174. He mentioned it again in 1885 

 and also in 1887, when he gave the locality as station 170. 



It was described in detail and figured by Dr. P. Herbert Carpenter in his report 

 on the comatulids of the Challenger Expedition published in 1888, and in the same year 

 it was listed as a host of myzostomes by Braun, quoting from von Graff. Dr. Clemens 

 Hartlaub in 1895 discussed its systematic and bathymetrical relationships, and in 1896 

 Prof. Arnold Lang reproduced Carpenter's figure (plate 21, figure 1) redrawn so as to 

 show all the arms and pinnules complete. In 1904 Capt. F. W. Hutton listed Antedon 

 incisa as a New Zealand species, and in 1907 it was listed by Hamann. 



In my first revision of the old genus Antedon published in 1907 incisa was made 

 the type of the new genus Charitometra. In my revision of the families Thalassometri- 

 dae and Himerometridae published in 1909 I listed Charitometra incisa, and in my 

 memoir on the crinoids of the Indian Ocean published in 1912 it was again listed and 

 the synonymy and range were given. In my memoir on the unstalked crinoids of the 

 Siboga Expedition published in 1908 incisa was included in the key to the species of 

 Charitometra and the synonymy and range were given. In 1928 Prof. Torsten Gisl6n 

 published notes on the specimens in the British Museum. 



Genus POECILOMETRA A. H. Clark 



Antedon (part) P. H. CARPENTER, Pop. Sci. Rev., vol. 4, No. 15, 1880, pi. 6, fig. 10, and following 

 authors. 



Poecihmetra A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 361 (diagnosis; genotype 

 Antedon acoela P. H. Carpenter, 1888) ; Bull. Mus. Comp. Zool., vol. 51, No. 8, 1908, p. 245 (same) ; 

 Proc. Biol. Soc. Washington, vol. 21, 1908, p. 136 (referred to the Thalassometridae) ; Proc. U. S. 

 Nat. Mus., vol. 34, 1908, p. 211 (referred to the Thalassometridae), p. 212 (occurs in Japan); 

 Proc. Biol. Soc. Washington, vol. 22, 1909, p. 18 (listed, with included species) ; Crinoids of the 

 Indian Ocean, 1912, p. 9 (absent from Australia), p. 11 (absent from the west coast of the Malay 

 Peninsula, from the Andamans, and from farther west), p. 25 (range), p. 60 (in key), p. 225 

 (original reference; type); Unstalked crinoids of the Siboga-'Exped., 1918, p. 172 (in key; range), 

 p. 190 (key to the included species). GISLEN, Ark. Zool., vol. 19, No. 32, Feb. 20, 1928, p. 9; 

 Kungl. Fysiogr. Sallsk. Handl., new ser., vol. 45, No. 11, 1934, p. 18. 



Diagnosis. The genital pinnules have the third to seventh and fifth to ninth seg- 

 ments greatly expanded, the segments beyond the expanded portion of the pinnules 

 being very small; the ossicles of the division series and lower brachials are relatively 

 narrow and well separated from each other, the gaps between them being more or less 

 completely bridged over by the lateral extension of the dorsolateral edge into a thin 



