346 



PLATE II 



Figs. 1-4 relate to Gromia Ditjardini M. Sclmltze. 



Figs. 1 and 2. Two drops of protoplasm, appearing hyaline during life, 

 which had been set free by pressure from the protoplasm of the oral 

 aperture of a specimen ; after treatment with picro-sulphuric acid and 

 staining with Delafield's haematoxylin. Both the drops show the alveolar 

 layer very distinctly. 



Fig. 3. Large pseudopodium with numerous fine branches. Quite hyaline 

 during life. Figured after fixing with picro-sulphuric acid and staining 

 with Delafield's hsematoxylin. The fibrillated alveolar structure very 

 distinct throughout almost the whole pseudopodium. 



Fig. 4. Point of origin of some thick hyaline pseudopodial stems from the 

 protoplasmic tuft of the aperture. Note how the fibrillated alveolar 

 nature of the tuft partly extends even to the commencement of these 

 pseudopodia, here becoming less and less distinct, and finally vanishing 

 entirely. 



Fig. 5, a-b. Margin of a living drop of protoplasm, isolated by pressure from 

 a Milliolid. It shows a very beautiful alveolar layer and a well-developed 

 radial striation of the peripheral protoplasm generally. 5, b, a small 

 portion of the margin more strongly magnified, in order to represent the 

 alveolar layer more accurately. 



Fig. 6. Living bridge of protoplasm, which was stretched across between 

 the fragments of a squashed Milliolid. It had a distinctly fibrillated 

 alveolar structure, and was at the same time in a constant state of 

 undulatory streaming movement. 



Figs. 7-8. Pseudopodia of Amoeba Umax after treatment with picro-sulphuric- 

 osmic acid. The alveolar structure is perfectly distinct as far as their 

 extremities, as also the alveolar layer. 



