I HANDY BOOK OF 



XII. Arthrochdia, from joint and a branch, 

 1, ViUoscij fibrous arthrocladia, 



DESMARESTIA LIGULATA, 



Family IV.— Dictyote^!. 



Marine plants, of an olive-green colour, and membrana- 

 ceous, flexible substance, rarely cartilaginous or juicy, with 

 a highly reticulated or veined-like net-work structure. 



Frond round or flat, simple or branched, without nerves 

 or veins, excepting in Halyseris ; often divided in a fan- 

 like manner. 



fructification either in lines, in patches, or sori, and 



