PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 469 



Golden Hind; Sagami Bay (lat. 35°04' N., long. 138°41' E.); 201 meters; Alan 

 Owston, August 6, 1902 [A. H. Clark, 1908] (1, U.S.N.M., 35645). 



Golden Hind; Sagami Bay Gat. 35°03' N., long. 138°47' E.); 155 meters; Alan 

 Owston, August 14, 1902 [A. H. Clark, 1908] (1, U.S.N.M., 35647). 



Dr. Th. Mortensen's station 9; off liiu-Shiu, Japan; 162 meters [Gislen, 1927] 

 (2, CM.). 



Geographical range.' — Southern Japan, from Iviu-Shiu eastward to Sagami Bay. 



Bathymetrical range. — ^From 71 to 254 (?278) meters; the average of 15 records is 

 186 meters. 



Thermal range. — The 4 records show a range of from 11.01° C. to 20.39° C, with 

 an average of 14.65° C. 



Remarks. — -This species was original]}- described in 1907 from a specimen dredged 

 by the Albatross at station 4947 in the preceding year. 



In 1908 additional specimens were recorded from Sagami Bay where they had 

 been dredged by Mr. Alan Owston in his yacht Golden Hind in 1902, and an abnormal 

 one was described. 



In 1922 Dr. Torsten Gisl6n recorded two specimens of this species from Dr. SLxten 

 Bock's station 11 under the name of Erythrometra rubra as he acknowledged in his later 

 work of 1927, when two further specimens were recorded from Dr. Mortensen's station 9 

 off Kiu-Shiu. 



PEROMETRA PUSILLA (P. H. Carpenter) 



Anledon, sp. P. H. Carpenter, Proc. Roy. Soc, vol. 28, 1879, p. 384. 



Antedon pusilla P. H. Carpenter, Challenger Reports, Zoology, vol. 26, pt. 60, 1888, pp. 103, 131 

 (description; Challenger sta. 192), pi. 23, fig. 1. — Hamann, Bronn's Klassen und Ordnungen dea 

 Tier-Reichs, vol. 2, Abt. 3, 1907, p. 1578 Oisted).— A. H. Clark, Proc. U.S. Nat. Mus., vol. 33, 

 1907, p. 144 (comparison with Anledon minor); vol. 39, 1911, pp. 561, 562 (systematic position; 

 referable to Perometra and related to P. diomedeae); Crinoids of the Indian Ocean, 1912, p. 33 

 (of P. H. Carpenter, 1888= Perometra pusilla). 



Nanometra pusilla A. H. Clark, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 349 (listed). 



Perometra pusilla A. H. Clark, Proc. U.S. Nat. Mus., vol. 39, 1911, p. 561 (does not possess P. 

 according to Bell; referable to Perometra), p. 562, footnote (personal examination shows that it 

 doe.s posssess P.); vol. 40, 1911, p. 43 (synarthrial tubercles compared with those of P. afra); 

 Crinoids of the Indian Ocean, 1912, p. 33 { = Antedon piisilla P. H. Carpenter, 1888), p. 233 

 (synonymy; locality; comparison with P. diomedeae); Smithsonian Misc. Coll., vol. 61, \o. 15, 

 1913, p. 58 (published reference to specimen in B. M.; Challenger sta. 192; comparison with 

 P. diomedeae) ; Unstalked crinoids of the Siboga-E\ped., 1918, p. 234 (references). 



Diagnostic features. — -There are 10 arms in the unique holotype, which arc only 

 about 30 mm. long; the cirri are few in number (XVII in the type) and relatively short, 

 up to 6 mm. long with 28 segments, that is about a fifth as long as the arms; P, has 

 Cylindrical segments though the following pinnules have their outer segments expanded 

 and slightly spinous at the distal ends; P» is present. 



Descrij)tion [modified by A.M.C.]. — The centrodorsal is low hemispherical. 



The cirri are XVII, the longest with about 28 segments and measuring about G 

 mm. in length; few of the segments are longer than broad and the distal have a slight 

 dorsal keel, rounded in lateral view. 



The IBr, are short and oblong, with the center of the distal edge raised to meet 

 the proximal edge of the axillary and form a quite prominent tubercle. A similar, but 



