ox A NKW SIMKMKS OK OHAWLINO MKDTSA 

 (CN1I>(>M':MA IIASWKLLI) kkom aisti^aija. 



UY 



E. A. l^HiiiiiP, B.Sc, Lecturer and Deinoiisti ator in Zooloo-y, 

 University of Sydney. 



(I'lates xvii.-xviii.) 



IXTKOPUCTION. 



Inn i-ecently published paper Giloliristi lias described a new genns 

 and species of ci-iwling Medusa, (' niilnncuni iu(j,eiiKo^- iY(^^\\ tlie Cape of 

 Good Hope. Fioni an examination of botli tlie medusa, and the liydi'oid 

 stage of the Cape species lie concludes that the crawling Medusa? of the 

 Southern Hemisphere are generically distinct fi'om the northern forms. 



The crawling Medusa' of the Northern Hemisphere belong to the 

 genus Elenther'xi, which is repi'esented by only two species, Eleiithen'd 

 dichofoinii, Qnatrefages, and J'J. rhijKU-eilfi, Hartlaub. 



The first ci-awling Medusa to be I'ecorded from the Southeiii 

 Hemisphere was described by Browne^ in 1902 as Ehuitlier'ni ralhutiui, 

 from a single specimen obtained fiom Stanley Hai'boui', Kalkland Islands. 



Later, specimens of a pelagic animal were taken by the French 

 Antarctic Expedition (190o-5) off Waiidel Island, and in a short paper 

 " Sur un Animal pclagiqiie de la Region antarctique " Bedot^ leferred the 

 specimens to a new genus and species, Wdinh'Jia rlnirrati. 



In 1910 Browne^ described anothei- new species, EJi'iitherla lioilijsoiii, 

 which was obtained by the National Antarctic Expedition fiom McMurdo 

 Sound. At the same time he recognised that the animal of unknown 

 affinities described by Bedot as WdmJella vlntrcntl was also a species of 

 Eif'nt](prin and changed the name to E. rlinrcoti. 



In the following year (1911) V^aiihoffen'' described and figured the 

 small crawling Medusa which Chun had previously referied to the genus 

 ]<]hitfJien'(i in his " Reiserbericht iiber die Tiefsee-Ex[)edilion." These 

 specimens were collected by the Geiman Deep Sea I'lxpedition on the 

 lobes of the thallus of Marroci/sliK in Gazelle Harbour and Observatory 

 BaA', Kergiielen. As the lesnlt of his examination of this material 

 from Kei'guelen, Vanhoffen concludes that the three southern species, 



' Gilchrist— Quart. Journ. Micro. Sci. (n.s.), Ixiii., 4. 1919. pp. 009-529. 



- 'Not capensis ; Ciiidonemic is neuter gender. 



"■ Browne— Ann. Mag. Nat. Hist. (7), ix., 1902, p. 279. 



^ Bedot— Expect. Antarct. Frangaise (1903-5), Chtircot, 19U8, pp. 1-."). 



■' Browne— National Antarctic Expedition, (1901-1904), Nat. Hist., v., 1910, 

 Coelenterata, v. -Medusae, p. 28. 



'' Vanhoffen — Wissen. Ergobuisse der Deut'^cliou 'J'icfsce-Exped. , "Valdivia," 

 xix., 5, 1911, pp. 19:!-2:}3. 



