s%" j^-j .-•« ■■■«i*,»-y>, .'i?'^jyv*' -^f^b.^^^ :•**.%■ -K* •*'»<■ • ''«^''htv-*^^*'^ii^ft, >^'Tu'*.''>-c»it 



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Plate XII. 

 (Top) Medusae of Obelia. 



Photograph from life by D. P. Wilson 

 {Bottom) Cliysnora stranded on the Welsh coast. 



Photograph by Margaret Nyblad 



