BY G. T. PLAYFAIR. 



511 



form. For convenience of comparison, T append a Table of the 



Text-fig. 4. 

 Sipirotjyra mirahilis (Hass. ) Kiitz ; (a) conjugated cells ( x 330); {h, r) two 

 sizes of zj'gospore, {h x 660, c x 500); {d) form with broader filaments 

 and larger, more slender zygospore, ( x 330), 



dimensions of all these forms; in the characters of the cells, 

 chloroplasts, and zygospores tiiey are all one. 



Let Sp. kuusamoensis be united with Sp. Spreeiana, and ou] 



