520 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



In this genus, as is shown by a study of a long series of specimens of C. briareus, 

 the division series are ordinarily narrow and strongly rounded in the young, but 

 broaden with age, so that in highly developed specimens they are usually very broad, 

 sometimes almost in lateral contact, and are only moderately convex dorsally. 



It is only fair to Gislgn to say that I made exactly the same mistake in my mono- 

 graph on the crinoids of the Indian Ocean. The locality Futschau given under C. 

 imbricata is based upon 2 specimens of C. grandicalyx. 



The specimens from Bock's stations 51 and 62 Gisle"n differentiated as C. grandi- 

 calyx var. flagellipinna, saying that they are distinguished from typical grandicalyx 

 by the nearly smooth P D , by the very short brachials, by a more slender habitus, 

 and by the trifling size of the disk when compared with the length of the arms. 



The apparent smoothness of P D is undoubtedly due to the fact that these speci- 

 mens were originally preserved in formalin. The length of the brachials is not 

 especially significant in this group, and the relative size of the disk is very variable. 



Localities. Eastern Asia (probably the Korean Straits); Captain Suensson 

 April 19, 1911 [A. H. Clark, 1913] (1, C. M.). 



Off the Goto Islands, near Nagasaki (lat. 33 08' N., long. 129 20' E.); 65 

 meters; Schonau, March 14, 1890 [A. H. Clark, 1909] (1, C. M.). PI. 29, fig. 87. ' 



Sagami Bay (lat. 35 06' N., long. 139 42' E.); 91 meters; Alan Owston, April 

 24, 1902; original No. 7216 [A. H. Clark, 1908] (1, U.S.N.M., 22697). PL 62, fig. 173. 



Aburatsubo; Prof. Franz Doflein, 1904; original No. 294 (1, Munich Mus.). 



Dr. Sixten Bock's expedition to Japan station 51A; Bonin Islands; in the Channel; 

 64 meters; August 3, 1914 [Gislen, 1922]. 



Dr. Sixten Bock's expedition to Japan station 52; Bonin Islands; Taki-no-ura 

 Channel; 55-73 meters; August 3-4, 1914 [Gislen, 1922]. 



Dr. Sixten Bock's expedition to Japan station 62; Bonin Islands; in the channel 

 between Chichijima and Anoiima; 20 meters; August 1914 [Gislen, 1922]. 



Geographical range. Southern Japan from the Korean Straits to Sagami Bay, 

 and the Bonin Islands. 



Bathymetrical range. Sublittoral; from 20 to 91 meters. The average of 5 

 records is 61 meters. 



History. This species was originally described in 1908 from a single specimen 

 collected in Sagami Bay by Mr. Alan Owston in his yacht, the Golden Hind. 



In 1909 in a paper on the crinoids in the Zoological Museum at Copenhagen I 

 recorded a specimen of Comanthus parvicirra ("rotalaria") from off the Goto Islands. 

 But I soon found that this was in reality a young individual of Comantheria imbricata, 

 and in my monograph on the crinoids of the Indian Ocean published in 1912 I men- 

 tioned among the localities given for C. imbricata "off the Goto Islands," though I 

 gave no indication of the source of this record. Among the localities I also gave 

 Futschau (Fuchow). The specimens on which this was based were 2 in the Hamburg 

 Museum which really represent C. grandicalyx. 



In 1913 in a paper on the unstalked crinoids of eastern Asia I gave as a locality 

 for this species "Eastern Asia (probably Korean Straits)." No indication for the 

 basis of this record was given, but the specimen bearing this locality is one in the 

 Copenhagen Museum collected by Captain Suensson. 



