MAEINE ALGjE. 61 



Order X. DELESSEBIACEiE. 



Kosy or purplish red, or blood-red, sea-weeds, with a 

 leafy or rarely filiform, areolated, inarticulate frond. 

 Leaves delicately membranaceous. Fructification double. 



LI. Delesseeia. 



Frond rose-red, flat, membranaceous, with a percur- 

 rent mid-rib. Fructification of two kinds on distinct 

 individuals. 



1. Delesseria sanguinea. 



2. „ sinuosa. 



3. „ alata. 



4. „ angustissima. 



5. „ Hypoglossum. 



6. „ ruscifolia. 



LIT. NlTOPHYLLUM. 



Frond membranaceous, reticulated, rose-red, veinless, 

 without mid-rib. Fructification double. 



1. Nitophyllum punctatum. 



2. „ Hillise. 



