^.K.^1^^4^.;^. 



CHAPTER II. 



DESCRIPnON OF GENERA AND SPECIES. 



Sub-Class.— CHLOROSPORM. 

 Ox6&.—SIPHONEM. 

 Genns.—BRYOFSJS* Lam. 



^JltHE American genera of this order are ail inhabit- 

 Gi ants of tlie warmer seas, except tlie Bryopsis, 

 and tiiat is represented by but one species in oui 

 northern waters. The characteristic of the order is 

 the tube-like structure of the different parts of the 

 frond. Each main stem branch or branchlet is a 

 single long undivided cell, fiUed with a green granular 

 substance, suspended in the watery fluids of the plant. 



* Bryopsis=Moss-like 



