152 



THE MARINE BOTANIST. 



M.farinosa, '^ On various algse. Kather larger 

 and thicker than the preceding, with more promi- 

 nent fruit, but to me it appears merely a stronger- 

 grown variety." Harv. 



M, verrucata. " Grows on the fronds of Phyllo- 

 phora ruhenSy &c. Dotted over innumerable small, 

 pimply ceramidia. Looks like a still more advanced 

 state of M, memhranaceaP 



M. pustuhilata. Grows on PJiylL ruhens, 

 Chon. crispus, &c. " This is the largest and most 

 developed of this parasitic section, and, perhaps, 

 without much violence, the preceding species might 

 be considered as merely younger and imperfect 

 forms." Harv. Thick, dull purple or green. 

 Ceramidia numerous, large, rather prominent, 

 conical. 



HILDENBRANDTIA. 



Frond cartilagineo-membranaceous (not stony), 

 crustaceous; sub-orbicular, adhering by its lower 



