40G BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Inn sfiffaior station 175; off northeasiem Ceylon flat. 8°51'30" N., l ong 81°11'52" 

 E.); ">1 meters; April 20, 1894 [A. II. Clark, 1909, 1912, 1918] (1, U. S. N. M., 35241). 



Geographical range. — From the Philippines southward to New Britain and west- 

 ward to northeastern Cc3 T lon. 



Bathymetrical range. — From the shoreline down to 77 meters. 



History. This species was originally described in 1890 by Dr. Clemens Ilartlaub 

 as Antedon finschii from four specimens in the Berlin Museum, which had been 

 collected in New Britain tNeu-Pommern) by Dr. Otto Finsch. It was redescribed 

 in greater detail and figured in the following year. One of the original specimens 

 was subsequently transferred to Gottingen and another to the United States National 

 Museum. 



Ilartlaub said that this fine new species is easily distinguished from all the other 

 members of the Palmata group. In the first place the cirri, which are composed of 

 60-80 segments and may reach a length of 60 mm., are unusually long for a member 

 of this group, and in the second place the strong flattened productions of the outer 

 sides of the postradial series are highly characteristic. He noted that the development 

 of the shelflike production of the sides of the postradial series is very variable, and on 

 some rays it is wholly lacking. According to Hartlaub this species in these features 

 very decidedly approaches the Spinijera group, but it cannot be included in that 

 group because its pinnules have no ambulacral skeleton. 



In 1895 Prof. Rend Koehler recorded and gave notes on a specimen that had been 

 collected by M. Korotnev in 1885 at Biliton. 



In my first revision of the old genus Antedon published in 1907, Antedon finschii 

 was referred to the new genus Himerometra. 



In 1908 I described a new species, Himerometra gracilipes, from Albatross station 

 5163 in the Philippines. 



In a revision of the family Himerometridae published in 1909, I referred gracil- 

 ipes to the new genus Dichrometra. I said that I had not been able to place Antedon 

 finschii satisfactorily because of lack of material for comparison, but that it appears 

 to be most closely related to Pontiometra andersoni, and the diagnosis of the genus 

 Pontiometra may have to be altered for its reception. Later in 1909 I described 

 Dichrometra aranea from a specimen from Investigator station 175. 



In 1911 I established the new genus Selenemetra with Antedon finschii as the 

 genotype, at the same time describing Selenemetra viridis from Albatross station 

 5413. In another paper published in the same year I compared Selenemetra finschii 

 with Dichrometra articulata. 



In a paper on the crinoids of the Hamburg Museum published on November 7, 

 1912, I said that from the published description and figure of Antedon erinacea I had 

 assumed that this form is allied to the species of Stephanometra with which it was 

 associated by Hartlaub and, as it differed materially from all the forms I had grouped 

 in that genus, I had suggested the generic name Oxymetra for it. Examination of 

 the type specimen, however, showed that it had nothing to do with the species of 

 Stephunometra but instead is closely related to the species I had grouped in the genus 

 Selenemetra, especially to S. tenuicirra. The generic name Oxymetra with Antedon 

 erinacea Ilartlaub as the genotype has precedence over the generic name Selenemetra 

 with Antedon finschii Hartlaub as the genotype, so that all the species heretofore 



