2 EDWARD T. BROWNE. 



PAGE 



Ptychogena antarctica, Browne . . . 29 



Mitrocomidse. REVISION OF THE GENERA. Cosmetirella, Cosmetira, 



Tiaropsis, Mitrocomella, Mitrocoma . . ... 32 



Cosmetirella simplex, g.n. et sp.n. 

 Cosmetira frigida, sp.n. . 

 Pantachogon scotti, sp.n. . 

 Solmundella mediterranea (Miiller) 



II. SCYPHOMEDUS.E : 



Lucernaria vanhoeffeni, sp.n. .... . . 40 



Periphylla. NOTE ON THE SPECIES . . .42 



Periphylla dodecabostrycha (Brandt) ... .42 

 Atolla wyvillii, Haeckel ......... 47 



Desmonema. NOTE ON THE SPECIES . .48 



Desmonema cliierchianum, Vanhoffen . . . .49 



Desmonema gaudichaudi (Maas) .... .49 



RENNIE'S ANTARCTIC SIPHONOPHORES .... .51 



Diplulmaris antarctica (Maas) ..... .52 



Diplulmaris gigantea, sp.n. ...... .56 



LIST OF BOOKS AND MEMOIRS QUOTED IN THE TEXT ... .58 



DESCRIPTION OF PLATES . . . . . . . . .60 



INTRODUCTION. 



THE collections of Medusae brought home by the ' Discovery ' and ' Southern Cross ' arc 

 combined in this report. There was nothing whatever to be gained by keeping the 

 collections separate, as they were made in localities not far apart, within two years of 

 each other, and both belong to the British Museum. Many of the species are common 

 to both collections, and as the collections contained a high percentage of specimens in 

 very bad condition, it was a distinct advantage to be able to use the best specimens 

 and to pass over the bad ones. Some of the specimens were in such bad condition that 

 without a good clue it would have been impossible to determine the genus. 



With such soft-bodied animals as jelly-fishes so much depends, for a good 

 description and figure, upon the condition of the specimens. There is a difference 

 between a description or drawing of a living Medusa in perfect condition and one based 

 upon a contracted and damaged specimen. When dealing with the latter kind one has 

 to use a certain amount of imagination, and to make allowances for defects. Although 

 some of the figures may not be absolutely accurate in outline, still I have striven to 

 make clear the characters of the species. 



