PSILOTUM. 



487 



The changes occur from the circumference to the cen- 

 tre, in which the appearance of no. 3. viz. cells with so- 

 litary nuclei or rather solitary nuclei, will be found, the 

 membrane not being distinct. 



Otherwise the cells containing many granular nuclei 

 are very evident, particularly towards the circumference. 

 4h. The changes affect chiefly the circumference, in which 

 there is an evident tendency to the separation of the 

 compound cells into as many cells, with nuclei, as there 

 were nuclei. And towards the centre, there is likewise 

 a tendency to the appearance of the compounnd cells. 



There does not appear any change in the parietal 

 cells. 



Among the cells occur granules of smaller size, with 

 a very defined edge, and without proper membrane. 

 These correspond in appearance with the nuclei of the 

 parietal cells, at least after the action of nitric acid. 



5. The next stage consists in the enlargement and distinc- 

 ness of the cells entering into the formation of the 

 compound ones, they still however adhere, but generally 

 the original common membrane is not distinguishable. 



These cells have a grumous appearance with a nucle- 

 us j and nitric acid dissolving or contracting the glume 

 into the nucleus, shews them to be nucleary, with a 

 beautiful hyaline membrane. 

 5J. Appearances not uniform, adhering or incrusted cells, 

 all having been enlarged, or only so in part, but the 

 grouping of the cells still continues ; otherwise all sorts 

 are seen, simple and large, with a large inner cavity to 

 which granules adhering give a crystalline or incrusted 

 appearance to compound cells, with several adhering cells 

 as in the preceding. The defined membraneless granular 

 nuclei still found. 



6. Appearances not uniform, nor reconcilable with the pre- 

 ceding. Parietal cells not evident. Compound cells 

 visible, containing several other cells, each with its own 



