A MONOGRAPH OF THE EXISTING CRINOIDS 317 



Java; M. Philibert [J. Muller, 1849; Dujardin and Hupe\ 1862; P. H. Carpenter, 

 1879, 1882, 1883, 1888; BeU, 1882; Hartlaub, 1891; A. H. Clark, 1907, 1909, 1911, 

 1912, 1913, 1918] (1, P. M.). 



Geographical range. — From the Andaman Islands to the Malay Peninsula and 

 Java. 



Bathymetrical range. — Littoral. 



History. — This species was first described under the name of Comatula philiberti 

 by Prof. Johannes Muller in 1849 from a specimen from Java collected by M. Philibert 

 which he had personally studied in the Paris Museum. The original description was 

 translated and republished by Dujardin and Hupe in 1862. 



In 1879 Dr. P. H. Carpenter referred this species to the genus Antedon, and in 

 1882 he compared it with his new Antedon bipartipinna (=Craspedometra acuticirra) 

 to which he believed it to be closely related. 



Prof. F. Jeffrey Bell in 1882 published a specific formula for this form, and early 

 in the following year Carpenter published a corrected and emended formula. 



As this species was not among the comatulids secured by the Challenger, Car- 

 penter did not discuss it in detail in the Challenger report. He merely inserted it in 

 the key to the species of the Savignyi group in which it was paired with Antedon 

 bipartipinna, these two species being distinguished in the key from all the other 

 species of this group by having the IIIBr series 4(3+4). Under this common heading 

 he characterized philiberti as having 45 cirrus segments, the later ones short and spiny, 

 whereas in bipartipinna there are nearly 60 cirrus segments of which the later are 

 longer than broad and quite smooth. 



Dr. Clemens Hartlaub in his key to the species of the Savignyi group published 

 in 1891 put bipartipinna with (Himerometra) crassipinna under a section characterized 

 by having the IIIBr series both 2 and 4(3+4), while philiberti was placed alone in a 

 section characterized by having the IIIBr series all 4(3+4). 



In my first revision of the genus Antedon published hi 1907 I assigned philiberti 

 to the new genus Himerometra, and in my revision of the family Himerometridae 

 published in 1909 I retained philiberti in Himerometra, though with a query. 



Having received for study the extensive collections assembled by the Royal 

 Indian Marine Surveying steamer Investigator, I found among them a specimen from 

 Port Blair in the Andaman Islands that seemed to represent a very distinct new 

 species, quite different from any form with which I was personally acquainted. This 

 I described in 1909 under the name of Amphimetra mortenseni. 



In the following year I visited Paris and there examined Midler's type specimen 

 of philiberti. I saw at once that it represented the same species as my recently de- 

 scribed Amphimetra mortenseni. In 1911 I published notes on this specimen, using 

 the name Amphimetra philiberti, and said that my A. mortenseni was a synonym of this 

 species. 



In my monograph on the crinoids of the Indian Ocean published in 1912 I repub- 

 lished my description of Amphimetra mortenseni under the heading Amphimetra 

 philiberti, and figured a typical specimen of the former. I recorded four additional 

 specimens from the Andaman Islands in the main portion of this work and another 

 in the appendix, and mentioned Java and Kwala Cassan as the other localities from 

 which it is known. 



