PLANTS WITH TRAPS AND PITFALLS TO ENSNARE ANIMALS. 



139 





Fig. 25A. -Swarmspores, Zygospores, and Chlorophyll-bodies. 



-d, Development of Swarmspores in the tubular cells of Vaucheria 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 Desmidieae (i, Clos- 

 terium Leibleinii; k, Penium interruptum). 1, Formation of Zygospores and spiral arrangement of Chlorophyll-bodies 

 in cells of Spirogyra arcta. m, Star-shaped Chlorophyll-bodies in cells of Zygnema pectinatum. n o, Gloeocapsa san- 

 guinea. p, Protonema of Schistostega osmundacea. q, Transverse section of the foliage-leaf of Satureja hortensis. All 

 figs, enlarged. 



Restricting ourselves to a consideration of other members of the family Scro- 

 )hulariaceae allied to Lathrcea and Bartsia, we find in the Lousewort (Pedicularis) 



