FRESHWATER ALGÆ FROM TUDDAL IN TELEMARK. 153 



IV. Systematic Account. 

 Glass Myxopliyceæ. 



Order Coccogoneæ. 

 Family Chroococcaceæ. 



Genus Synechococcus- Nägeli 1849. 



1. Synechococcus ceruginosus. JMäg. Gatt. einz. Alg. 

 General, but somewhat scarce. Up to 5000 feet, especially 

 amongst Sphagnum. 



Fig. 1. 



Genus Chroococcus. Nägeli 1849. 



2. Chroococcus turgidus. (Kütz.) Näg. 1. c. 

 Protococcus turgidus. Kütz. Tab. Phycol. 



General, and sometimes in great abun- 

 dance. Up to 4100 feet. Size: diam. cell. 

 17,5—23,«. Figure 1. 585 x . 



3. Chroococcus macrococcus. (Kütz.) 

 Rabh. Flor. Europ. Alg. ? Urococcus insignis. 

 Hass. Brit. Freshw. Algæ. Protococcus macro- 

 coccus. Kütz. Phycol. General. 



This species occurred in abundance in some of the 

 samples obtained amongst Sphagnum. The colour was usually 

 golden brown, and there were sometimes red pigment-spots. 

 Size: Cells without, integument ca. 40.«. PI. V, Fig. 3. 



4. Chroococcus minutus. (Kütz.) Näg. Gatt. einz. Algen. 

 Protococcus minutus. Kütz. Tab. Phycol. 



Somewhat rare, but in quantity in a few samples. Size: 

 diam. cell. 9—10 u. 



5. Chroococcus pallidus. Näg. 1. c. 



On the floor of a primitive showder-bath, where cold water 

 was running. (Ca. 8oC.). Associated with Chlorella and diatoms. 

 Size: diam. cell. 4— 5 jt<. 



