quadrate. The ceramidiu are sessile or nearly so, borne laterally on the 

 branches, at some distance below the last ramifications, and are very broadly 

 ovate, somewhat broader than long : their surface is laxly areolate. The 

 colour when growing is a pale reddish-grey, more or less tinted with red ; 

 when dry it is either red-brown or very dark and blackish. The substance 

 is firm, cartilaginous when recent ; and in drying the plant shrinks, and 

 adheres, but not very strongly, to paper. 



A well-marked and pretty little species, of the same section 

 as P. cancellata. The ramification here is almost as regularly 

 dichotomous as in the genus Ceramium, and the tips of the ra- 

 muli are hooked inwards, a very unusual character in the present 

 genus. I had formerly given it the name forcipata, having 

 overlooked a species so named by Kiitzing. The name now given 

 is equally appropriate. 



Fig. 1. PoLYsiPHONiA FORFEX, — the natural size. 2. Apex of a ramulus. 

 3. Transverse cutting of the same. 4. A ceraraidium, m situ. 5. Spores 

 from the same : — the latter figures magnified. 



