RHODOSPERME®. 165 
plants, contains only two species which are found in Britain. Fig. 152 
represents a very characteristic frond of Gymnogongrus Griffithsie, bearing 
several gongri or nemathecia. These curious bodies are composed entirely 
Fic. 152. Gymnogongrus Griffithsie. 
of necklace-like strings of tetraspores, which in the living state under the 
microscope are as brilliant as tiny rubies, and each tetraspore is faintly 
marked with a cross, hence the term “‘cruciate,’’ as applied to tetraspores 
Fie. 153. Gymnogongrus Norvegicus. 
so divided. The fronds of this little plant are tufted, and each has a 
distinct stem about half an inch long, which suddenly branches out into 
@ slender but densely entangled frond, dichotomous or forked, the axi 
