THE MARINE BOTANIST. 203 



pinnated with slender^ horizontal, distichous, 

 subulate ramuli-" Harv. This plant is not 

 unhke the var. latifolmm of G. Corneum, but 

 the substance when fresh is said to be much 

 softer, and the colour is a dull-brown red, be- 

 coming* brighter in fresh water. 



CHONDRUS. 



Name signifying cartilage, in allusion to the substance of 

 the frond. 



Frond cartilaginous, nerveless, ^compressed, or 

 flat, fan-shaped, dichotomously cleft. Fructifica- 

 tion: 1, prominent tubercles (nemathecia), con- 

 taining spores; 2, tetraspores in sori, immersed 

 in the frond ; 8jfavellidia immersed in the frond, 

 and scattered over its segments, containing minute 

 spores. 



CHONDRUS CRISPUS.— CRISP 

 CHONDRUS. 



Fronds forked, curled, or flat ; the segments 



