MARINE ALGiE. 



81 



12. Conferva Youngana. 



13. „ clandestina. 



XCIV. OCHLOCH.ETE. 



Frond disciform. Filaments radiating from a cen- 

 tral point, consisting of a single series of cells, each cell 

 produced above into a rigid, inarticulate bristle. Fruc- 

 tification unknown. 



1. Ochlochsete hystrix. 



Order XVI. ULVACEiE. 



Green ; composed of small polygonal cells, forming 

 membranous tubes. 



XCV. Enteeomorpha. 



Frond tubular, of a green colour, and reticulated struc- 

 ture. Fructification, three or four roundish granules. 



1. Enteromorpha Cornucopias. 



2. „ intestinalis. 



3. „ compressa. 



4. Linkiana. 



G 



