l.-.s 



MEUUS.K OF THK WOULD. 



The definitions of Bougainvillia and Nemopsis here proposed are identical with those of 

 Hargitt, 1904, p. 37. 



Species of Bougainvillia are widely distributed in all seas, but are especially abundant in 

 the cold waters of the northern hemisphere, a remarkably large number being found in the 

 North Sea near Helgoland, by Hartlaub, 1897. Many of the species are very closely related 

 and their distinctions may be due in part to environmental influences. Hallez found that 



"T ulndar Synopsis of the Medusa nj Bougainvillia. Continued. 



*Medusa allied to B. fariJa 



