THE MARINE BOTANIST. 211 



naked warts containing strings of bead-like tetra- 

 sporeSi 



GYMNOGONGRUS GRIFFITHSI^.— GRIF- 

 FITHS' GYMNOGONGRUS. 



Fronds fi-om two to four inches high; tufted 

 and repeatedly forked. Substance and colour not 

 unlike Gracilaria confervoides. Fructification : 

 small warts surrounding the stem containing tetra- 

 spores. These are described by Dr. Harvey, in the 

 ^^ Phycologia Britannica/' as most bieautiful : when 

 seen under the microscope, each appears marked, 

 with a white cross enclosed in a covering, and bril- 

 liant as a ruby. Perennial. Autumn and winter. 

 Grows on rocks, mostly within tide-marks. Coast 

 of Devon. Torbay. Long Rock in Mount's Bay, 

 Cornwall. Balbriggan. Bantry Bay. Malahide. 

 Odius' Bay, Stronsa. 



