122 



1- I, 1 T K III. 



Fig. 30. Euastrum sexangulare. a. middle cell, with 

 six corners 5 b. edge -cells in two parts 5 



c. transparent middle -skin 5 d. oily drops of 

 the green content. Size: 0,000345. 



31. Euastrum hex agonum. Hexagon middle cells 5 



d. transparent middle skin 5 a. thick oily 

 drops. Size: 0,000915. 



w 32. Euaslrum pentangulare. a. Middle cell with 

 five angles 5 b. cells of the octogone forked 

 edges 5 c. transparent intermedial skin 5 d. 

 green and solid content. Size: 0,003195. 



33. Stauridium bicuspidatum. No middle -cell 5 

 a. intermedial transparent skin 5 green con- 

 tent, with small moveable oily drops. Size: 

 0,001765. 



34. Stauridium Crux Melitensis. a. Middle skin. 

 The largest diameter: 0,00785. 



35. Pediastrum quadrangulum. d. Middle qua- 

 drangular cell, without intermedial skin, and 

 consequently the intervals c. between the 

 three empty and perforated cells 5 b. green 

 content with molecules, and moveable oily 

 drops. Size: 0,001765. 



36. Pediastrum irregulare. b. irregular middle- 

 cells 5 a. a. cells of the forked eclges with 

 a green molecular mass. Size: 0,000960. 



V JL A T E IV. 



37. Sphaeroxosmaelegans. Breadth of a member: 

 0,000955 a. globule uniting pairs of animal- 

 cules 5 b. b. these animalcules individually 

 united by the intermedial membrane c. d. d. 

 oily drops with their content. 



38. Diatoma fenestratum Ag. Length of a mem- 

 ber: 0,001035 breadth: 0,00042. a. brown 

 content in the cells of members d. b. seen 

 sidewise5 c. common intestinal tube of a chain 

 of animalcules. 



