125 



. 64. Closterium didymotocum. Length: 0,00928. 

 a. mouth ; b. rotatory bladder ; c. twin glo- 

 bules of the bladder; e. intestinal tube; f. large 

 oily drops surrounding the tube; h. green 

 content; g. union of both parts of the cuirass. 



65. Extremity of the cuirass, strongly magnified; 

 a. mouth; d. rotatory bladder; e. twin glo- 

 bules; b. direction of their movement. 



66. Closterium caudatum, strongly magnified. 



67. Closterium spirale, strongly magnified; b. 

 rotatory globule; d. middle opening; h. in- 

 testinal spiral tube (?) 



68. Pleurosicyos myriopodus. Length: 0,000624. 

 a. sides (8); b. pedal bladders; c. trans- 

 parent and transversal band. 



69. Animalcule seen from upwards. 



70. Scalptrum striatum. Length: from 0,00085 

 to 0,00096; a. pedal bladders (?J; b. middle 

 opening, by which the brown content is 

 emitted; longitudinal stripes between both 

 sides c. of the cuirass. 



i- r, A T *: vi. 



71. Oscillatoria subulata. Thickness of the fila- 

 ment: from 0,00039 to 0,000465, strongly 

 magnified; a. maternal filament; b. second 

 filament; c. third filament; d. internodes; 

 e. points. 



72. The same; a. Maternal tube; the content 

 forms a small head b. , pushed forward for 

 the object of creeping. 



73. 74. Oscillatoria elegans. a. the head, moving 

 in the direction of the arrow, like a pendu- 

 lum; b. tube of the filament; c. blue greenish 

 content, thickness of the filament: 0,000145. 



75. Oscillatoria amphibia. Strongly magnified; 

 a. the head; b. division of a filament into 

 two parts; thickness of it: 0,00046; heigth 

 of the members : 0,00014. 



