HARD WICKE' S SCIENCE- G OSS IP. 



129 



•other to a greater or smaller extent (Fig. 92). Scat- 

 tered in between the single hyphoe are numerous 

 -spherical bodies, varying very much in size (Fig. 91). 

 They are occasionally aggregated together to form 

 colonies (zoogloea-stage ? Fig. 91). The hyphoe have 

 no transverse partitions, but are filled with round, 



3. Photographic (clearing) Solution of Ferrous 

 Oxalate (made by adding Ferrous Sulphate to 

 Potassium Oxalate, and diluting with Water). — In 

 this solution there was also an entangled mass of 

 hyphse. It consisted of light and dark portions. 

 The lighter portions were usually covered with a flat 



Fig. 89. Nat. size. 



Fig. 90. X 5 So. 



Fig. 91. X 580. 



Fig. 92. X 330. 



Fig. 93. X 580. 



T''<;^ 



A B 



Fig. 94. X 580. Fig. 95. — Nat. size, a, surface view ; b, lateral view. 



Figs. 89-92. — In solution of bromide of ammonium in water. Figs. 93-93. — In solution of ferrous oxalate. 



highly-refractive granules (spores? Fig. 91). With 

 the unaided eye we can easily make out darker-brown 

 portions in the mass of hyphae (Fig. 89). They con- 

 sist of darkly-coloured hypha (Fig. 90) which have 

 ^very strongly-thickened cell-walls, and are closely 

 'entangled with the other colourless hyphae. 



film on one side, on which were to be seen some dark 

 spots (Fig. 95), consisting of numerous dark-brown 

 spherical bodies (zoogloeoe ? Fig. 94). The colour- 

 less hyphce were septate, and contained numerous 

 round refractive granules (spores? Fig. 9:^6). The 

 darker hyphce, likewise septate, but of a dark-brown 



