noticed in salt water. Though not actually a marine plant, it 
has as much claim to a place in this work as some others already 
introduced, and I have pleasure in introducmg the genus to 
British botanists. I should mention that the Hormospora muta- 
bilis, stated to have been found by Mr. M‘ Ivor, proves on a 
more careful examination to be an animal substance.— WV. /Z_ZZ. ] 
Fig. 1. Young and mature filaments of HorMosPoRA RAMOSA, growing upon 
Cladophora fracta. 2. Cells become converted into spores :—all highly 
magnified (about 300 linear.) 
