A MONOGRAPH OF THE EXISTING CRINOIDS 45 



Australians, vol. 3, Lief. 13, 1911, p. 437 (northwest Australia; history), p. 441 (Australian 

 tropical species occurring south to Adele Island), p. 444 (range on the west coast), p. 446 (sum- 

 mary of west Australian records) ; Crinoids of the Indian Ocean, 1912, p. 38 (identity of Bell's 

 record), p. 156 (synonymy; localities); Smithsonian Misc. Coll., vol. 61, No. 15, 1913, p. 33 

 (published reference to specimens in the B. M.; localities; characters of the specimens) ; Internal. 

 Rev. gesamt. Hydrobiol. und Hydrogr., 1915, p. 224 and following (detailed account of the 

 distribution in Australia). GISLN, Kungl. Fysiogr. Sallsk. Handl., new ser., vol. 45, No. 11, 

 1934, p. 25; Kungl. Svenska Vet.-Akad. Handl., ser. 3, vol. 18, No. 10, 1940, p. 13. H. L. CLARK, 

 Echinoderm fauna of Australia, 1946, p. 48 (Australian records). 



Diagnostic features. The basal segments of all the proximal pinnules, including 

 P 2 , are carinate ; the carination on the basal segments of P 2 is low, with the crest straight 

 and parallel with the longitudinal axis of the segments. The arms are about 26 in 

 number, about 110 mm. long. The cirri are XIV, 35-37, about 20 mm. long. P 2 is 

 very stout, and is composed of 11-14 (usually 12) segments. 



Description. The cirri are XIV, 35-37, about 20 mm. long. They are rather 

 slender and are composed of short segments none of which are less than twice as 

 broad as long. The proximal segments are flattened dorsally. In the distal half of 

 the cirri the segments bear dorsally a pair of tubercles with their apices well separated. 



The ventrolateral processes on the elements of the division series are broad with 

 truncated or roundedly incised outer margins. 



There are in the type specimen 26 arms about 110 mm. long. 



P 2 is very stout and very strongly curved, and is composed of 11-14 (usually 12) 

 segments, most of which are about as long as broad. On the distal side the distal 

 ends of the segments are strongly everted and serrate, this eversion being well marked 

 even on the second segment. The first, second, and third segments of the earlier 

 pinnules are slightly carinate, the carination being sharply truncated and straight 

 edged so that the outer profile is straight and not convex as it is in C. emendatrix. 



The color in alcohol is white and purple in bands about one-quarter of an inch 

 in width. The cirri are brown. 



Note. The color of the specimen in the British Museum without locality is the 

 same as that of the type specimen from Adele Island just described. 



Localities. Baudin Island, northwestern Australia [Bell, 1894; A. H. Clark, 

 1911] (1, B. M.). 



Adele Island, northwest of Collier Bay and north of King Sound, northwestern 

 Australia [Bell, 1894; A. H. Clark, 1911, 1912, 1913] (1, B. M.). 



No locality [BeU, 1894; A. H. Clark, 1913] (1, B. M.). 



Geographical range. Northwestern Australia from Baudin Island to Adele 

 Island. 



Bathymetrical range. No depths have been recorded; but the dredgings that 

 yielded all the known specimens were hi shallow water. 



History. This species was first mentioned hi a list of crinoids collected in north- 

 western Australia published by Prof. F. Jeffrey Bell in 1894 under the name of Antedon 

 sp. (near macronema), the depth at which the specimens had been secured being 

 represented by a "?". In 1910 I examined Professor Bell's specimens at the British 

 Museum, and in my memoir on the recent crinoids of Australia published in 1911 

 I described them under the name of Cenometra cornuta, giving as the localities Adele 

 Island (type locality) and Baudin Island. In my report upon the crinoids collected 



