VJith their intorpidity appear numerous vacuoles which give them a 

 granular or spongy aspect and which, on becoming greater, often form a single 

 vacuole which, increasing in size, terminates by bringing about the disap- 

 pearstnce of the elaioplasts. 



Hip-peastrurii au2.icum Herb. 



In the cells of the external epidermis of the scales of some dormant 

 bulbs of Hippeastrum aulicum wa s found immersed in the cytoplasm a body which, 

 so far as I could determine, had not hitherto been observed; and I present 

 here a summary of the results of a study undertaken "by me as to the chemical 

 and structural constitution of the same. 



The body is endowed with a refractile elevation; it is found situated 

 in the cell in a non-determinate position and has dimensions which vary from 

 10 to 20 microns, and in certain cases even m.ore. It possesses a spherical 

 form and comprises a central part, £, and a peripheral part, b (Pl. XIII, 

 fig. 9). 



Ay 

 The central part iS of variable form and dimensions, homogenous 



A 



structure, and vacuolated. This latter character is that which predominates 

 and presents bimodality in the diverse phases of the development of the body, 

 following which the vacuoles are uneq.Tial but of uniform type, sparse througb- 

 out the mass of the central part, or superior in size to a single central 

 vacuole surrounded by others of smaller dimensions. Tj-^ not infrequent cases 

 in which they show marked vacuolization (PI. XIII, fig. 6) it may be noted 

 that the central vacuole, increasing and dissolving under other circumstances, 

 terminates in a manner comparable with the central part. In such a case the 

 body presents nothing other than a very large vacuole- limited by the peripheral 

 portion. 



