a conjecture to what extent the work will reach; at prefent I have only examined, 

 and that imperfectly, the environs of London, Yarmouth, and Dover, but from 

 what I have feen in thefe places, I am convinced that the Confervse are a far 

 more numerous tribe than is in general imagined. I folicit the afiiftance of other 

 Botanifls, and fhall receive with thanks any remarks tending to elucidate either 

 the fpecies previoufly defcribed, or thofe which ftill remain to be introduced. I 

 only beg leave to fay, that thefe plants muft not be judged of from dried fpeci- 

 mens; for when the granules in their interior fubftance once collapfe, no fubfe- 

 quent immerfion will reftore them to their former appearance, or bring back the 

 elafticity they poflefied when recent. To give as accurate an idea as poffible of 

 the relative fize of each plant, it appeared bed to ftate, after every figure, with 

 what power the drawing was made ; the numbers, therefore, denote the feveral 

 magnifying powers of a common compound microfcope. 



Higham Lodge, Walthamftow, 

 June ill. iSos. 



