(108) 



met with the plant in a living state. From C. nodosum it seems abun- 

 dantly distinct, both in habit and in fructification, and if the characters 

 are constant, there will be no great difficulty in distinguishing the two, 

 but from G. strictum we fear it will not be so easy to separate it ; 

 the principal differences seem to be the habit, a slight difference in the 

 fructifications, and the colour of the internodes. This last character is 

 not peculiar to the species, as it is frequent also in C. acanthonoium, 

 and other species ; and when viewed through the microscope, adds very 

 much to the beauty of the filaments. 





CERAMIUM FASTIGIATUM. 



EXPLANATION OF DISSECTIONS, &c. 



Fig. 1. — Portion of a filament. 



2. — Portion of a filament with favella. 



3. — Articulation from lower portion of same. All magnified. 



4. — Tuft of C. fastigiatum, half natural size. 



