8QCAMARIw?E, 155 



have been collected in various localities, particularly in 

 Scotland. I am, therefore, inclined to believe that un- 

 obtrusive habit, rather than rarity, has caused it to be 

 hitherto overlooked. 



Cruoria pellita. The skin-like Cruoria. 



Erouds spreading over rocks in indefinite red patches ; 

 fibres thick at the base, tapering upwards, repeatedly forked. 

 Tetraapores on the lower branches of the fibres. 



This plant grows between the tide-marks, and appears 

 to prefer a cold climate. 



Cruoria adheerens. The adhering Cruoria. 



Pronds spreading over rocks, in indefinite, purplish or 

 olive patches ; fibres tapering to either end, simple, or once 

 or twice forked. Spores unknown ; tetraspores zonate, on 

 the lower forkings of the fibres. 



This species differs from the last in the colour of the 

 frond, and in the branching and form of the fibres ; but 

 Professor Agardh appears to doubt whether these cha- 

 racters are sufficient grounds for the formation of two 

 species. 



Genus LXII. ACTIIfOCOCCUS. 



Pronds globose, very minute, of a red colour, parasitic, 

 composed of necklace-like fibres set in gelatine. Tetra- 

 spores cruciate, formed from the joints of the fibres, several 

 on the same fibre. — AcTiNOCOCcrs, from the Greek ahtis, 

 a ray, and coccos, a fruit. 



Actinococcus Hennedyi. Kennedy's Actino- 

 coccus. 



Pronds of a deep red colour, about as large as a poppy- 



