CONTENTS xi 



CHAPTER VIII 



Phtlum II. Chlobophyceae : Simple Algae 



Page 

 General Characters. Two Classes. Green Slimes; Palmel- 

 lales; Coenobiales. Confervas; Ulothrix; Oedogonium; 

 Disk Algae 370 



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; Stone worts. 

 Summary . . 184 



CHAPTER XI 



Phylum V. Phaeophycbae : Bbown Algae 



General Characters. Origin. Ecto carpus. 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 



