HUGHL! HOWRAH AND THE 24 -PERGUNNAHS. 
333 
* Oscillatoria Kurziana Mart. 
Botanic Garden, Shibpur, in water in flowerpots. 
* Oscillatoria linmosa A g. 
In tanks. 
* Oscillatoria tenerrima Kg. 
Salt-lakes, Calcutta. 
* Oscillatoria tenuis Lyngb. 
In ponds. 
* Oscillatoria versicolor Mart. 
Sali-lakes. 
723. Spirulina Turp. 
* Spirulina oscillarioides Turp. 
Salt-lakes, Calcutta. 
721. Phormidium Kg. 
* Phormidium oryzetorum Mart. 
Rice-fields ; the commonest Alga in Lower Bengal. 
* Phormidium Lyngbyaceum Kg. 
Salt-lakes, Calcutta. 
725. Lyngbya C. A. Ag. 
* Lyngbya crispa Kg. 
Salt-lakes, Calcutta. 
* Lyngbya circinnata Kg. 
Swamps and ponds, general. 
* Lyngbya cinerascens Kg. 
Salt-lakes, Calcutta. 
* Lyngbya solitaris Kg. 
Ponds, general. 
726. Leibleinia End!. 
* Leibleinia Juliana Kg. 
Salt-lakes, Calcutta. 
727. Hypheotlirix Kg. 
* llypheothrix tenax Mart. 
Salt-lakes, Calcutta. 
