lying among other Algae on the sand in Granville Bay ; they had 

 a saucer-like shape, which they have lost in pressing." They 

 consist merely of the secondary fronds, accidentally torn from the 

 firmly attached primaries, which may possibly be reached by 

 dredging on the coast. I have compared them with specimens 

 of the Mediterranean plant received from J. Agardh, and the 

 agreement is very perfect. There can, therefore, be no doubt of 

 the indentity of the species. 



Never having seen the primary frond, I give the specific cha- 

 racter and description nearly in the words of Agardh ; and our 

 upper figure (fig. 1) is an attempted' restoration of the flattened 

 specimen, more faithfully represented at fig. 2. 



Fig. 1. Zonaria collaris : — the natural size. 2. One of the fronds of the 

 same opened out : — the natural size. 3. Apex of frond, with its fringe. 4. 

 Filaments from the fringe : — both magnified. 





