The Cell 



17 



matin forms an independent, coarser, network, ramifying through the linin 

 network ; in other cells the chromatin is in the form of granules distributed 



Fig. 4. Yeast cells budding. (Sedgwick and Wilson, General Biology.) The 

 drawings of the successive stages, beginning at the left of the top row, show how the 

 bud forms from the cytoplasm before the nucleus divides. 



Fig. 5. Diagram of fission (Amitotic division) in the unicellular animal Parame- 

 cium. (Sedgwick and Wilson, General Biology.) Paramecium belongs to the class 

 infusorium which have nuclei differentiated into two distinct parts, viz., a relatively 

 large oval macronucleus and a much smaller micronucleus lying beside it. In the 

 figure the division of the macronucleus (mac) and of the micronucleus (mic) is 

 shown nearly completed, and division of the cytoplasm in progress. The Paramecium 

 has a definite mouth, shown at m. 



