274 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



In my first revision of the old genus Antedon published in 1907 I assigned this 

 species to the new genus Himerometra, calling it Himerometra variipinna, and in 

 1908 I recorded a specimen from Albatross station 5157 under that name. 



In a revision of the genus Himerometra published in 1909 this species was re- 

 ferred to the new genus Amphimetra as Amphimetra variipinna. Later in the same 

 year it was recorded from Singapore under this name and notes were given on the 

 specimens. 



In 1909 I described a new species based upon two specimens from Albatross 

 station 5157 which I called Craspedometra aliena; this supposed new species later 

 proved to be nothing but very slender examples of this species. 



In 1911 I recorded specimens from Albatross stations 5358 and 5481 under the 

 name of Amphimetra variipinna, and hi the same paper, under the heading Craspe- 

 dometra anceps, said that an examination of the Challenger types in London had 

 shown me that Carpenter's Antedon clemens is the same thing as his A. anceps and 

 my Craspedometra aliena. 



In a memoir on the recent crinoids of Australia published in 1911 I recorded and 

 gave notes upon a number of specimens in the collection of the Australian Museum, 

 and in giving the range of the species I included the details of the localities repre- 

 sented in the British Museum. In this report the locality Mergui Archipelago was 

 given by mistake for Andaman Islands, Pocock Island, taken from the label of an 

 unrecorded specimen in the Indian Museum, being the place referred to. In a 

 memoir on the collection of the Hamburg Southwest Australian Expedition pub- 

 lished at the same tune I included a detailed summary of the distribution of this 

 species on the Australian coasts, also including the data from the specimens in the 

 British Museum. 



In my memoir on the crinoids of the Indian Ocean published hi 1912 I recorded 

 and gave notes upon a specimen from Pocock Island in the Andamans, and included 

 in the synonymy of this species for the first time Comatula dubia von Graff, 1877, 

 Antedon bidentata, and Antedon dubia P. H. Carpenter, 1888. A complete list of the 

 known localities was given. 



In the same year, having examined the type of Carpenter's Antedon variipinna at 

 the Hamburg Museum hi 1910, I published a redescription of it showing that it does 

 not represent the species previously called variipinna, but instead, so far as I could 

 see, represents the species subsequently called Antedon brockii by Hartlaub. I 

 therefore called this species Amphimetra crenulata, remarking at the same time that 

 I had unfortunately overlooked the type of this form while at Hamburg. In a 

 supplementary report on the crinoids collected by the Hamburg Southwest Aus- 

 tralian Expedition published in 1913 I repeated this information. 



Dr. August Reichensperger hi 1913, misled by my erroneous disposition of 

 Craspedometra aliena in 1911, determined as Craspedometra anceps an interesting 

 specimen collected by Dr. H. Merton hi the Aru Islands. He described this speci- 

 men hi detail and figured the proximal pinnules. He was somewhat doubtful hi 

 regard to the correctness of this determination, and was rather of the opinion that 

 it would turn out to be a new species for which he suggested the name Craspedometra 

 aruensis. 



