THE MARINE BOTANIST. 313 



of one or several rows of cells^ appears doubtfully 

 to belong" to this tribe, therefore it is not included 

 in the following pages. 



MARINE GENERA OF THE ULVA 

 TRIBE. 



Enteromorpha, Frond tubular, simple or branched ; 



green. 

 Ulva, Frond leafy 5 gTeen. 

 Porphyra, Frond leafy ; purple. 



ENTEROMORPHA. 



Name meaning entrail-liJce, in allusion to the form of the 

 fronds. 



Frond tubular, hollow membranaceous, of a green 

 colour, and reticulated structure. Fructification : 

 three or four roundish granules, aggregated in the 

 reticulations. — Grev. 



