Marine Algoe of Berwich-on-Tweed. 363 



A smaller plant than Harveyella mirabilis, from which it 

 appears to differ in structure ; it was the first of this curious 

 group of parasitical Florideae described by Eeinsch, and is 

 consequently to be regarded as the type of the genus Choreocolax. 



To follow Melobesia pustulata, p. 358. 



Melobesia macrocarpa, Rosanoff. 

 Kecherch., p. 74. 

 Descr. Melobesia macrocarpa, Bosan., I.e. 

 Fig. „ „ „ t. 4, fig. 2-8 et 11-20. 



Sab. On the roots and stipes of Laminaria hi/perborea. Not uncommon. 



Berwick Bay. 

 To the naked eye exactly like Melobesia pustulata, from which 

 it is distinguished by its large two-parted tetraspores. 



