a. lorenz. i qo a; 
Plate VII. Marsupella Sullivantii (DeNot.) Evans. 
Fig. i and 2. Plants, X 80. 
“ 3. Leaf-cells, X 480. 
“ 4, 5 and 6. Leaves, X 80. 
The figures were drawn from specimens collected by the writer at South- 
ington, Conn. 
All reduced to two-fifths. 
