236 



ZYGNEMATACEAE 



Figs. H to K. — Sirogonitim phacospoitim vegetative cells, conjugation pattern, and 

 2 views of spore with markings. After Skiija. 



Vegetative cells 54-60 /<• x 100-^70/1; chromaiophores usually 4, 

 rarely 3, straight or slightly curved; conjugation direct; receptive gam- 

 etangia inflated, 95-110/1 x 150-190 /x; zygospores lenticular, 70-100 /x x 

 60-70/^; median spore wall 2-3 m thick, yellow or brownish yellow, 

 finely reticulate-scrobiculate. As in other species, spores sometimes 

 deformed by the gametangial walls. 



Burma, near Rangoon, in running water, 1936. (L. P. Khanna Coll.). 



List of the Species of SIROGONIUM with Number 



ceylanicum Wittrock i S89 6 



fioridanum (Transeau) G. M. Smith 1933 4 



hui (Li) Transeau 1944 10 



illinoiense (Transeau) G. M. Smith 1933 9 



indicum Singh 193H 11 



megasporum ( Jao) Transeau 1944 3 



melanosponim (Randhawa) Transeau 1944 8 



phacosponim Skuja 1949 12 



pseudofioridimum (Prescoii) Transeau 1944 5 



sticticum (Engl. Bot.) Kiitzing 1843 2 



tenuius (Nordstedt) Transeau 1934 ^ 



venter siciim Transeau 1934 7 



