SPONGIOCARPE.E. 



151 



G. corneum, var. /3. sesquipedale, Grev. 



var. 7. pinnatum, Grev. 



var. 8. uniforme, Turn, 



var. e. capillaceum, Turn, 



var. f. latifolium, Grev. 



var. 7). confertum, Grev. 



var. 6. flexuosum, Harv. 



var. 1. aculeatum, Grev. 



var. k. abnorme, Grev. 



var. \. pulchellum, Turn, 



var. fi. claviferum, Grev. 



var. v. clavatum, Grev. 



var. 0. crinale, Grev. 



Order XIII. SPONGIOCARPE^E. 



Brown-red 8ea-u:ee(ls with cartilaginous, cylindrical, branch- 

 ing fronds composed of interlaced filaments closely set in 

 firm gelatine. Spores large, obconical, radiating from a 

 central point, in external, wart-like conceptacles ; tetra- 

 spores oblong, cruciate, formed in the outer filaments of 

 the upper branches. 



Genus LVII. POLYIDES. 



Root an expanded, fleshy disc. Frond cylindrical, carti- 

 laginous, forkedly branched, composed of three series of 

 fibrous cells, springing one from the other : the cells of the 

 first, or central series, which occupy about half the dia- 

 meter of the frond, are cylindrical, branched, longitudinal, 

 and densely packed; those next to them, which form the 

 intermediate series, are large, oblong, coloured, and set in 

 forked fibres, which curve outwards, and pass gradually 

 from an almost erect to a horizontal position ; and those 

 which compose the external, or bark series, are minute, 

 oblong, forked, and perfectly horizontal. Spores in wart- 



