PLATE I. 



SWARMSPORES AND ZYGOSPORES. 



FORMS OF CHLOROPHYLL-BODIES. 



a — d Developtoent of swarmspores in the tubular cells of lauclurla clavata. 



e — h Swarmspores and resting-cells of " red-snow " [Sphaerella nivalis), mixed 

 with pollen-grains of Pines. 



i — k Forms of Chlorophyll in cells of Desmidie.T (i. Closterium Leibleinii; 

 k. Penium interruplum). 



1 Formation of zygospores and spiral arrangement of Chlorophyll-bodies 

 in cells of Spirogyra arda. 

 m Star-shaped Chlorophyll-bodies in cells of Zygnaema pectinatum. 

 n — o Gloeocapsa sanguine a. 



p Protonema of Schistostega osmundacea. 



q Transverse section of the foliage-leaf of Cres* ^r.jy-^^^t- ■x^j^'-i^'-'' 

 r Transverse section of the leaf of the Passion-flower. 

 s Relative positions of laticiferous tubes and palisade-cells in the leaf 

 of a Spurge (Euphm-hia Myrsiniies). 



All the figures greatly magnified. 



