HOW TO KNOW THE FRESH-WATER ALGAE 



Schioederia 

 p. 64, fig. 88 



Selenastrum 

 p. 53, fig. 67 



Tetraedion 



Family Oocystaceae 

 Ankistrodesmus 

 p. 54, fig. 68 

 Bohlinia 



p. 80, fig. 120 

 Cerasterics 



p. 86, fig. 130 

 Chlorella 



p. 65, fig. 91 

 Closteridium 



p. 65, fig. 90 

 Closteriopsis 



p. 69, fig. 98 

 Dactylococcus 

 p. 52, fig. 65 

 Dictyosphaerium 



p. 47, fig. 53 

 Dimorphococcus 



p. 47, fig. 52 

 Echinosphaerella 

 p. 78, fig. 117 

 Eremosphaera 



p. 81, fig. 123 

 Excentrosphaera 

 p. 83, fig. 126 

 Franceia 



p. 56, fig. 73 

 Gloeotaenium 

 p. 61, fig. 83 

 Kirchneriella 



p. 49, fig. 56 

 Lagerheimia 



p. 79, fig. 118 

 Nephrocytium 

 p. 50, fig. 59 

 Oocystis 



p. 62, fig. 85 



Pachycladon 

 p. 85, fig. 128 



Palmellococcus 

 p. 82, fig. 125 



Planktosphaeria 

 p. 48, fig. 55 



Polyedriopsis 

 p. 86, fig. 129 



Quadrigula 

 p. 50, fig. 60 



p. 87, fig. 131 

 Treubaria 



p. 87, fig. 132 

 Trochiscia 



p. 80, fig. 119 

 Westella 



p. 60, fig. 81 

 Family Scenedesmaceae 

 Actinastrum 



p. 58, fig. 78 

 Coronastium 



p. 42, fig. 43 

 Crucigenia 



p. 56, fig. 72 

 Errerella 



p. 57, fig. 76 

 Micractinium 



p. 57, fig. 75 

 Pectodictyon 



p. 43, fig. 44 

 Scenedesmus 



p. 57, fig. 74 

 Tetradesmus 



p. 59, fig. 79 

 Tetrallantos 



p. 49, fig. 57 

 Tetrastrum 



p. 55, fig. 71 



8. Order Siphonales 



Family Phyllosiphonaceae 

 Phyllosiphon 

 p. 66, fig. 92 

 Family Dichotomosiphona- 

 ceae 

 Dichotomosiphon 

 p. 123, fig. 198 



9. Order Zygnematales (Con- 

 jugales) 



Family Zygnemataceae 

 Debarya 



p. 96, fig. 149 



192 



