DictyotecB^ zonaria. 139 



take ; yet it is difficult to imagine wliat could liave been 

 mistaken for it^ so different in appearance is it from all other 

 Alga?/^ 



Dr. Greville says, '^ We have few Algae more singular or 

 beautiful than this/^ Dr. Harvey says, " Its general resem- 

 blance to the expanded tail of the peacock has been noticed 

 by all authors. When viewed growing under water this 

 resemblance is pecuharly striking, the fringes of capillary 

 fibres which adorn it decomposing the rays of light, and 

 giving rainbow-colours to the surface.''^ See a showy figure 

 of it in ^ Phycologia Britannica/ PL xci. 



Genus XYI. ZOIN'AIIIA, Areschoug, 



Generic Character. Eoot coated with woolly fibres. Frond 

 flat,' ribless, fan-shaped, enthe or cleft, marked with concentric 

 lines, the cells radiating. Fructification, scattered aori. — The 

 name is from the Greek word for a girdle or zone. 



1. ZoNAEiA PARVULA, Arescli. 



Hab. Eocks in the sea, on shells and on large Sea- 

 weeds. Rare. Annual? Spring and summer. Found by 

 Dr. Greville and Miss Cutler at Sidmouth. 



The frond is procumbent, attached to other substances by 



