564 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



PI is 8-9 mm. long, singularly slender, slightly stiffened, and is composed of about 

 15 segments, which are slender, cylindrical, and much longer than broad. P is 

 present. P 2 is at least 15 mm. long, stouter than P,, with about 28 cylindrical seg- 

 ments, which are at least twice as long as broad except for the first, which are shorter 

 than those following and prismatic. P 3 is almost as long as P 2 and is composed of 

 about 25 segments. P 4 has only 18 segments. From this point onward the pinnules 

 decrease in length, remaining always very slender and delicate. Toward the middle of 

 the arms they have a length of about 10 mm., with a width of only 0.5 mm., and are 

 composed of about 18 segments, which are longer than broad and of which the 

 terminal is a recurved hook; the segments are joined smoothly end to end without any 

 projections. The disk is incised and naked. The color in alcohol is dark brown. 

 Professor de Loriol's note on the fifth postradial series shows that this individual was 

 undergoing adolescent autotomy. Dr. Gislen compared the specimen from Cochin- 

 china with one from Misaki and failed to find any difference. 



Remarks. This species is closely related to D. ciliata, from which it appears to 

 differ chiefly in its much more robust build, much stiffer and more wiry, though other- 

 wise exactly similar, elongated proximal pinnules, and, when fully grown, in the 

 greater number of arms, the arms in D. ciliata being 34-42. In D. ciliata the proximal 

 pinnules appear to be composed of a greater number of segments, P] having 29, P 2 

 having 34, and P 3 having 31 instead of 24, 28-29, and 27-29, respectively, as in D. 

 doderleini. In D. ciliata P 3 is only 1.5 mm. longer than P 2 instead of 2-3 mm. longer 

 as in D. doderleini. 



Localities. Enoura Bay, Suruga Gulf, southern Japan (lat. 3501'N., long. 

 13846' E.); 150 meters; Prof. Franz Doflein, 1904-'05 [A. H. Clark, 1915, 1916, 1918] 

 (1, Munich Mus. [original No. 337]). 



Misaki, Japan [Gisle'n, 1936]. 



Kagoshima, Japan [de Loriol, 1900; A. H. Clark, 1907, 1908, 1912, 1913, 1915, 

 1918]. 



Eastern Asia (probably the Korean Straits); Captain Suensson (1, C. M.). 



Pulo Condor, Cochinchina; littoral; Dr. C. Dawydoff [Gislen, 1936]. 



Geographical range. Southern Japan from Sagami Bay westward to the Korean 

 Straits, and southward to Cochinchina. 



Bathymetrical range. From the shoreline down to 150 meters. 



History. This species was first described, with figures, under the name of 

 Antedon doderleini by Prof. Percival de Loriol in 1900. His specimen came from 

 Kagoshima, Japan. 



In my first revision of the old genus Antedon, published in 1907, Antedon doderleini 

 was transferred to the new genus Himerometra. 



In a list of the crinoids of Japan published by me on July 15, 1908, Himerometra 

 doderleini was included. In a list of the names that had been applied to recent crinoids, 

 published on August 25, 1908, I gave Dr. [Ludwig] Doderlein as the collector of the 

 type specimen of Antedon doderleini. Although the species was named for Professor 

 Doderlein by Professor de Loriol, there is no evidence that the type specimen came 

 from the collection of comatulids made by the former in Japan. 



In my memoir on the crinoids of the Indian Ocean published in 1912, Dichrometra 

 doderleini was listed, and the synonymy and range were given. It had been omitted 



