CONTENTS 



Xlll 



Type XII 



VATTCHERIA . . 



1. Structure . 



2. Reproduction . 



Type XIII 



PLETTEOCOCCUS VTJLGARIS . 



PAGE 



174 

 175 



176 



182 



B. THE PH.EOPHYCILE 

 Type XIV 



ECTOCARPTJS SILICULOSUS 



1. Structure 



2. Reproduction 



185 

 185 



Type XV 



PELVETIA CANALICTJLATA . 



1. Structure 



2. Reproduction . 



189 

 190 

 194 



C. THE FLORIDE.E 

 Type XVI 



201 



CALLITHAMNION CORYMBOSTJM 



1. Structure 



2. Reproduction 



a. Asexual . 



b. Sexual 



202 



204 

 206 



D. THE CYANOPHYCE^ 

 Type XVII 



NOSTOC 



212 



