^ 



Nucleus of the Animal and Vegetable "- Cell:' 205 



Fig. 5. The cytoblast has become a cell ; its contents 

 finely granular, — the remains as they are of the yjg 5. 

 finely granular substance of the cytoblast in the 

 preceding figure.* That which was the nucleolus 

 in figs. 2, 3, 4, is now the nucleus. This nucleus, a 

 mass of hyaline, is surrounded by minute globules, 

 as in fig. 2 ; and, like one of the bodies in that figure, pre- 

 sents, in its turn, an ill-defined nucleolus. Compare with two 

 of the cells ft in fig. 34 of Plate I. 



Fig. 6. The minute globules are no longer seen. They 

 appear to have entered into the formation of the ^j g 

 membrane by which the hyaline nucleus is now sur- 

 rounded. This hyaline nucleus is in the same state |^8^ 

 as the entire body fig. 3,— that of a young cytoblast. ^|jp 

 It represents the *' hollow nucleus" and " inner 

 cell" of authors. The nucleolus is now well-defined. Com- 

 pare with 7 of fig. 34, in Plate I ; and read the description of 

 that figure. 



Fig 7. The hyaline nucleus of the cell has become finely 

 granular, and is now as much a cytoblast as the Y\g, 7. 

 body, fig. 4. Compare with the nucleus of several 

 cells in fig. 39 of Plate I., and with the concentric 

 cytoblasts in fig. 41 of the same Plate. 



Fig. 8. The nucleus or cytoblast of fig. 7 has 

 become a cell, and that which was the nucleolus in p. g^ 

 iig. 7, is now the nucleus of this cell. Farther, in 

 the centre of the nucleus which had been a nu- 

 cleolus, another nucleolus is coming into view. The 

 hyaline, much increased in quanttty, is giving off" 

 globules into the surrounding substance, and is 

 hence nodular or star-like in its form. Compare with two 

 cells on the right hand, and with other bodies in fig. 39 of 

 Plate I. 



Fig. 9. The segments of the nodular or star-like hyaline 



* The fii-st contents of all cells have a like mode of origin ; and it is not easy 

 to say where the cytoblast terminates, and the cell begins; so that often one is 

 obliged to use almost indiscriminately the terms " cytoblast" and " cell." 



