80 STATE HORTICULTUBAL SOCIETY 



APHANOCAPSA, Naeg. 



968. A. grevillei, (Hass.) Rabenh. 



A form referred to this species has been found once in 



stagnant water. 

 GLOEOCAPSA, Naeg. 



969. G. arenaris. 



Forms thin seruginous coating on damp stone. 



970. G. magma. 



On granitic boulders. 

 MICROCYSTIS, Kg. 



971. M. aeruginosa. 



Very abundant in Lake Okoboji. 

 GOMPHOSPH^RIA, Keg. 



972. G. aponina, Kutz. 



Found once only. Should be common in stagnant water. 

 COELOSPHJERIUM, Naeg. 



973. C. kuetzingianum. 



A frequent algae in many permanent ponds, often float- 

 ing in considerable quantities in the lakes. 

 MERISMOPEDIA, Meyen. 



974. M. glauca, (Ehrenb.) Naeg. 



This algae is common floating in the quiet waters of 

 ponds. 



975. M. elegans, A. Br. 



A form agreeing with this species in all essential char- 

 acteristics has been once collected. 



OSCILLAEIEJE FAMILY. 



SPIRULINA, Linke. 



976. S. major, Kutz. 



Slough, amid Lemna trisulca. 



OSCILLARIA, BOSC. 



977. 0. angustissima, (W. & G. S.) West. 

 In pond with other algae. 



978. 0. tenerrima, Kuetz. 



A common species in stagnant water, and on soil. 



