372 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



In 1857 Prof. Chr. F. Ltitken mentioned Alecto milberti as an American species in 

 his account of the echinoderms of Greenland. 



Dujardin and Hupe in 1862, under the headings Comatula tessellata, Comatula 

 milberti, and Comatula jacquinoti, published translations of Miiller's original 

 descriptions. 



Wyville Thomson in 1865, under Antedon tessellatus, mentioned the plating of the 

 disk as described by Miiller. 



In 1866 Prof. Addison E. Verrill said that he had not seen Antedon milberti, 

 which had been described from "North America." Verrill again mentioned the 

 species, as Antedon milbertii, in 1867, and in 1869 Count Pourtales noted that it had 

 been described from North America. 



In 1879 Dr. P. H. Carpenter referred milberti and jacquinoti to the genus Antedon 

 as that genus was understood by him, but he wos unable to place Comatula tessellata, 

 as he knew of no description from which it is possible to obtain any information regard- 

 ing the position of the mouth or the character of the oral pinnules. 



In October 1882 Prof. F. Jeffrey Bell published specific formulas for Antedon 

 milberti and A. jacquinoti, and in April 1883 Dr. P. H. Carpenter published emended 

 formulas for the same species. 



In the report upon the collections of H. M. S. Alert published in 1884 Professor 

 Bell recorded Antedon milberti from Port Molle, Port Denison, the Prince of Wales 

 Channel, and Torres Strait and said that the rich supply of this species in the Alert 

 collection amply justified the doubts that P. H. Carpenter had expressed to him as to 

 the exactness of the locality (North America) ascribed by Miiller to this species. He 

 remarked also that this species was well represented in a collection of E. P. Eamsay's, 

 of the Australian Museum, Sydney. Only a single specimen from Port Molle, how- 

 ever, represents the present species, all of the others being examples of the closely 

 allied Amphimetra discoidea. 



In the Challenger report on the comatulids published in 1888 Carpenter made 

 Antedon milberti the type of a special group that he called the Milberti group, to which 

 he assigned a heterogeneous assemblage of 14 ten-armed species. In the key to these 

 species he inserted milberti and tessellata; milberti was said to possess cirri with 25-40 

 segments, while tessellata has cirri with 45 segments and an intersyzygial interval of 

 8-11 muscular articulations. He remarked in a footnote that he had not seen the type 

 specimen of tessellata. 



In the synonymy of Antedon milberti he placed jacquinoti and one of the two speci- 

 mens upon which Grube's Comatula laevissima was based (see page 353). The Antedon 

 milberti of the Challenger report includes the following forms herein regarded as dis- 

 tinct: Amphimetra tessellata (Ceram; Alert, Port Molle [part]); Amphimetra molleri 

 (North Borneo; Challenger stations 203 and 212; Padan [=Padau] Bay); and Amphi- 

 metra discoidea (Alert, Port Molle [part]; Port Denison; Prince of Wales Channel; 

 Torres Strait). 



Carpenter said that under the name milberti he had united the two species that 

 were found by Miiller in the Paris Museum with the manuscript names Comatula 

 milberti and Comatula jacquinoti, which had been given them by Valenciennes. 

 They are each based upon single specimens, which he had carefully examined in 1876 

 and again in 1880, and the subsequent study of a considerable amount of material 



