408 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



Dr. James A. Grieg in 1904 discussed this species in great detail, paying particular 

 attention to the status of quadrata, and recorded it from a number of stations on the 

 Michael Sars cruises of 1900, 1901, and 1902, and from several new localities in West 

 Finmark. 



Prof. Ludwig Doderlein hi 1905 published a monographic account of this species 

 based upon the Helgoland collections, Dr. Michailovskij listed it from some additional 

 Yermak stations, Mr. J. Schmidt recorded it from east of Iceland from specimens 

 taken in 1903, Dr. K. A. Andersson mentioned a pentacrinoid from the cirrus of an 

 adult taken off Spitzbergen by the Frithiof expedition of 1900, Dr. August Reichen- 

 sperger discussed various points in its anatomy, and Dr. Wilhelm Minckert took up 

 various features connected with its structure, with special reference to regeneration. 



In 1906 Prof. K. Derjugin recorded it again from the Kola Fjord, where it had 

 been found by Jarzynsky in 1869 and 1870, and gave a list of the localities in the fjord 

 at which it had been dredged by the station ship Orca. 



Dr. M. Kalischewskij 's important memoir on the echinoderms of the Zarya ex- 

 pedition to the New Siberian Islands, in which the known range of this species was 

 extended far to the eastward, appeared shortly after his death in 1907. In the same 

 year Prof. Grieg recorded the material in the Belgica collections of 1905 and I described 

 under the name of Antedon arctica a curious little specimen, since found to be quite 

 typical of the normal young, from Cape Sabine which, through some mischance, I 

 located in Alaska. 



In the following year Andersson again mentioned the pentacrinoid found on a 

 cirrus of a specimen from the Frithiof expedition, and says that he examined all the 

 specimens in the Stockholm Museum without finding another; and under the name 

 of Heliometra juvenalis I described a very curious variety from the Esquimaux collection. 



In 1909 Prof. Rene Koehler gave a complete account of all the collections resulting 

 from the various cruises of the Prince of Monaco's yacht Princesse Alice, Prof. Grieg 

 described at greater length the specimens from the Belgica cruise of 1905, and Dr. S. V. 

 Averincev (Awerinzew) described the occurrence of this animal as determined by the 

 surveys carried out from the biological station at Alexandrovsk in the Kola Fjord. 



Professor Grieg hi 1910 gave the details of the occurrence of this species as found 

 during the Belgica cruise of 1907 about southern Nova Zembla, and Dr. Th. Mortensen 

 recorded the specimens collected by the Danmark in 1906-08, at the same tune de- 

 scribing two pentacrinoids collected by the Frithiof in 1900. 



In 1911 Professor Derjugin listed a number of localities in the Kola Fjord where 

 this species had been found by the Alexander Kovalevsky, the ship operated from the 

 station at Alexandrovsk, and Dr. Edwin Kirk compared the centrodorsal and arm 

 bases with the corresponding structures in fossil types. 



In 1912 Prof. Clement Vaney recorded the material from the dredgings of the 

 Pourguoi Pas? about Jan Mayen, and Prof. A. Appell0f summarized the distribution 

 of glacialis in the Norwegian Sea. 



In 1913 Dr. Th. Mortensen published a summary of all the localities from which 

 this species is known hi Greenland, which was repeated in the following year, and in 

 1915 Prof. Nils von Hofsten described hi great detail its distribution and especially 

 its occurrence hi the Ice Fjord, Spitzbergen. 



In 1914 Professor Vaney published additional records from the dredgings of the 

 Pourguoi Pas?. 



