

/v 





CHAPTER II. 



DESCRIPTION OF GENERA AND SPECIES. 



Sub-Class.~ CHLOROSPOR^. 

 Oxdex.—SIFBONE^. 

 Genus.— BR VORSIS* Lam. 



[HE American genera of this order are all inhabit- 

 ed^ ants of the warmer seas, except the Bryopsis 

 and that is represented by but one species in oui 

 northern waters. The characteristic of the order is 

 the tube-hke structure of the different parts of the 

 frond. Each main stem branch or branchlet, is a 

 single long undivided cell, filled with a green granular 

 substance, suspended in the watery fluids of the plant. 



* Biyopsis= Moss-like. 



