[Chap. XLVll 



THE ALGAE 



615 







25 26 



Fig. 280. Forms of 

 1 and 5 Gloeocystis, 



some miicellular 



2 Kirchneriella, 



8 Qiiadrigula, 9 Vo/uox, 10 Aiferococcu 



30 



ae. Genera represented: 



and colonial al^ 



3-4 Oocijstis, 6 Carteria, 7 Sphaerella, 

 ,11 Chlamydomonas, 12 Selenastmm, 13 

 Micractinium, 14 Pleodorina, 15 Euglena, 16-17 Phacus, 18 Coelastrum, 19 Goniiim. 

 20 Ankistrodesmus, 21 Gloeotaenium, 22 Actinastrum, 23 Pediastrum, 24 Pandorina, 

 25-26 Scenedesmus, 27 Tetraedron, 28 Ophiocytitnn, 29 Pediastrum, 30 Sorastrum. 



