,^:=5- -^^^-^^^^'^' ; ^^ ■ c_ =^^^ 



CHAPTER II. 



DESCRIPTION OF GENERA AND SPECIES. 



Sub-Class.— CHLOROSPOR^. 

 Oxdex.— SIPHONED. 

 Genus.— BR VOPSIS* Lam. 



^Jl^HE American genera of this order are all inhabit- 

 <^j ants of the warmer seas, except the Pryopsis, 

 and that 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, filled with a green granular 

 substance, suspended in the watery fluids of the plant. 



♦ Biyopsis= Moss-like 



