(xi) 



FRONTISPIECE. 



Pigs. 



1-3. Euglypha scutigera. Fig. 1. — Commencepient of 

 construction of a daughter-test. Fig. 2. — New test 

 completed; division of the plasma about to take 

 place. Fig. 3.— Conjugation of two individuals and 

 formation of a new one (on left) larger than either. 

 X 400. 



4. Euglypha tuberculata. Portion of test showing : 



(a) disposition of the scales; {h) surface only, x 535. 



5. Euglyfha mucronata. x 400. 



6. Euglypha ciliata. x 500. 



7. Euglypha hrachiata. x 400. 



8. Euglypha hrachiata. Portion of test showing scales. 



X 535. 



9. Placocista spinosa. x 250. 



10. Assulina seminulum var. seandinavica. x 350. 



11. Gyphod'eria trochus Y&T. palustris. x 875. 



12. Cyphoderia ampulla. In process of constructing a 



daughter-test, x 375. 



From micro-photographs by Herr Renkanf, Weimar, Saxony, 

 of slides prepared by Dr. Penard. 



