INDEX 271 
Ulopteryx, 76, 78, 79 
Ulothrix, 170, 172, 173 
Ulotrichacee, 170 
Ulva (Plate IV.), 174, 176 
Ulvaceew, 174 
Uteria, 154 
Urospora (Fig. 51), 166, 168, 169, 
170 
Vaginariee, 255 
Valonia (Fig. 46), 121, 156, 163, 
164 
Valoniacee, 156 
Valve, 189 
Vanvoorstia, 230 
Vaucheria (Fig. 34), 120, 127, 130, 
132, 133, 136 
Vaucheriacee, 127 
Wrangelia, 215 
Xiphophora, 55 
Zanardinia, 56, 57, 58, 59, 60 
_Zonaria, 60, 61, 63 
“Zoochlorella, 180, 181 
Zosterocarpus, 104 
._THE END 
RICHARD CLAY AND SONS, LIMITED, LONDON AND BUNGAY. 
