276 



RED ALG^. 



segments. 

 Serrated. 



Sinuous. 



Divisions of the fronds. 



Toothed like a saw. 

 f The margin crooked, bending in and 

 I out. 



Spindle-shaped. | 



Spines. 



Spores. 



Tapering to each end from a thick- 

 ened middle. 



Tetraspores, 



or 

 Tetragonidia. 



Top-shaped. 

 Tubercle. 



Small, thorn-like processes. 

 The seeds of the Algse, and other 

 Cryptogamic plants. 



The asexual spores of the Red Algse, 

 usually arranged in groups of fours. 



Veins. 



Vesicle. 

 Whorl. 



> Like a top, or a cone with the apex 



> downwards. 



A small excrescence. 

 /-Small, linear thickenings of the frond, 

 } which resemble the veinings, _pr 

 '^ framework of the leaves of trees. 



A bladder, 

 r Ramuli arranged in a circle around 

 1 the stem or branches. 



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