CONTENTS xi 



CHAPTER VIII 

 PHYLUM II. CHLOROPHYCEAE : SIMPLE ALGAE 



PAGE 



General Characters. Two Classes. Green Slimes; Palmel- 

 lales; Coenobiales. Confervas; Ulothrix; Oedogonium; 

 Disk Algae 170 



CHAPTER IX 

 PHYLUM III. ZYGOPHYCEAE: CONJUGATE ALGAE 



General Characters. Two Classes. Pond Scums; Desmids. 



Diatoms. Origin of Zygophyceae 177 



CHAPTER X 

 PHYLUM IV. SIPHONOPHYCEAE: TUBE ALGAE 



General Characters. Lower Tube Algae; Water Flannel; 

 Green Felts. Tube Fungi; Water Molds; Downy Mil- 

 dews; Black Molds; Insect Fungi. Higher Tube Algae; 

 Bladder Algae; Sea Ferns; Sea Umbrellas; Stoneworts. 

 Summary 184 



CHAPTER XI 

 PHYLUM V. PHAEOPHYCEAE : BROWN ALGAE 



General Characters. Origin. Ectocarpus. Kelps. Rock- 

 weeds. Gulfweeds , 199 



CHAPTER XII 

 PHYLUM VI. RHODOPHYCEAE: RED ALGAE 



General Characters. Cell-walls. Color. Reproduction. 

 "Laver." Nemalion. Corallina. Polysiphonia. "Irish 

 Moss" . . 205 



