98 PLANT ANATOMY. 
numerous separate granules of a roundish or polyhedral form * (as 
in the cotyledons of the pea’ and bean, Fig. 29 a), which fill the 
intervening spaces between the starch granules (in the pea), or the 
entire cell (the glutinous layer in the seeds of cereals). To 
these small granules the name of alewrone may likewise be 
applied. In a more restricted sense, the name of aleurone is 
applied to those large granules which, imbedded in a homo- 
geneous mass of albumen, replace starch granules to a certain 
extent, and which consist of a fundamental mass of an albu- 
men-like substance, inclosing crystalline (calcium oxalate) or 
seemingly crystalline, roundish bodies (glodoids). The albumen- 
like, fundamental mass is either amorphous or crystalline (erys- 
talloids); in the latter case, it is surrounded, together with the 
inclosed substances, by an enveloping, amorphous mass. 
Fic. 30.—Cells from the albumen of Semen Ricini (Sachs). A, a single cell in concen- 
trated glycerin ; the contents show but indefinitely formed masses. B, the game section 
with a little water added, whereby crystalloids, fine granules of protein substances and 
drops of oil are rendered visible. C, the same section warmed with more diluted glyce- 
rin, whereby the drops of oil become expelled, and the crystalloids attacked and gradu- 
ally dissolved. 
"The _globoids (phosphates of calcium and magnesium) are 
never wanting. Crystalloids * oceur handsomely developed in 
‘Mounting mediums containing water must, however, be nvoided ii in 
the preparation, since the granules thereby become destroyed, as has 
occurred, for instance, in Fig. 29. In the examination of aleurone gran-. 
ules with inclosed substances, concentrated glycerin or fatty oil is. 
always to be employed. 
* Compare Tangl, *‘ Das Protoplasma der Erbse.” Sitzungsbericht der 
Wiener Akademie, 1887. 
*From xpv6raddos crystal, and 7805 similarity. They owe their 
ie name to C. Nageli, _ er wage sptanie eo Akad.,” 1862, p. 121. 
