A MONOGRAPH OF THE EXISTING CRINOIDS 457 



the third brachial, the next on or about the thirteenth. The most proximal brachials are square, 

 those that succeed them are triangular. The second pinnule is very long and stiff, much longer than 

 the first or third. Arms purplish, with yellowish dots and patches; the cirri yellowish at base and 

 purplish at tip. 



Spread 120 mm.; diameter of disc 6 mm. 



Macclesfield Bank, 13 fms. 



In 1902 Professor Bell recorded Actinometra maculata "from the west reef of 

 Hulule, and very commonly seen at shallow depths on lagoon reefs in all the more 

 open atolls of the Maldives." The single specimen from Hulule labeled Actinometra 

 maculata in the British Museum represents the present species; whether the other 

 specimens were the same I do not know. 



In my first revision of the old genus Antedon published in 1907, I referred Hart- 

 laub's monacantha (which I misspelled monocantha) to my new genus Himerometra. 

 In the list of the species of Himerometra there appears as a nomen nudum the name 

 Himerometra helianthus. 



In 1908 I recorded Himerometra monacantha from Albatross stations 5109 and 

 5147 in the Philippines, and in another paper described as new species Himerometra 

 acuta from Fiji and H. heliaster from Ebon, Marshall Islands, the latter being the 

 form to which I referred in 1907 as Himerometra helianthus. In a list of the names 

 that had been applied to recent crinoids published in the same year, I said that 

 Bell's Antedon flavomaculata is not recognizable from the description. Although 

 described in the Spinifera group, this is probably a member of the Palmata group, 

 possibly of the Multicolor group, but certainly not of the Spinifera group. 



In my revision of the Himerometridae published in 1909 I referred acuta and 

 monacantha to the new genus Stephanometra, at the same time referring heliaster to 

 the new genus Dichrometra. In another paper published in 1909 I recorded and 

 gave notes upon specimens of Stephanometra monacantha in the collection of the 

 Copenhagen Museum from the Nicobar Islands, the Tonga Islands, and Singapore, 

 and identified Liitken's manuscript name Antedon zebrinus as referring to this species. 



In a paper on African crinoids published in 1911 I compared Stephanometra 

 monacantha and S. indica, and in a paper on the crinoids of the Leyden Museum I 

 compared the cirri of S. monacantha with those of S. spicata. In a paper on the 

 crinoids of the Paris Museum also published in 1911 I recorded and gave notes on a 

 specimen from New Caledonia. In a memoir on the crinoids of Australia and in 

 another on the crinoids of southwestern Australia, both published in 1911, I included 

 S. monacantha in the Australian fauna on the basis of Hartlaub's specimen from 

 Torres Strait, which is in reality S. indica. 



In 1912 Hartlaub recorded and described a specimen of Antedon monacantha 

 from Ebon, Marshall Islands, collected by the Rev. B. G. Luon (a misspelling for 

 Snow) in 1877. This specimen was one of the same lot from which came the type of 

 Himerometra heliaster described by me in 1908. Hartlaub also recorded and gave 

 notes on another specimen in the Liibeck Museum collected in the Sunda Strait by 

 Captain Storm. 



In a paper on the crinoids of the Hamburg Museum published in 1912 I recorded 

 having examined the specimen of Antedon monacantha from Mortlock Island described 

 by Hartlaub and noted that it bore the manuscript name Antedon militaris Hartlaub. 



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