MELANOSPERME^, OR OLIVE-COLOURED ALG.E. 



SYNOPSIS OF THE ORDERS OF MELANOSPERME^. 



* Frond leathery or memlranaceou-s, forming a compact cellular substance. 



1. FucACE^E. /Spores contained in spherical cavities of the frond. 



2. Sforochnace^. Spores attached to external, jointed filaments, which are either 



free, or compacted into knob-like masses. 



3. Laminariace^. Spores forming indefinite, cloudlike patches, or covering the 



whole surface of the frond. 



4. DiCTYOTACE^E. Spores forming definite groups (sori) on the surface of the frond. 



** Frond formed of jointed Jilammts^ which are either free, or united into a 

 co7npound body. 



5. ChordariacejE. Frond cartilaginous or gelatinous, composed of vertical and 



horizontal filaments interlaced together. Spores immersed. 



6. Ectocarpace.s;. Frond filiform, jointed. Spores external. 



