TO ELEMENTS OF PLANT ANATOMY. 
Both kinds occur in some forms of the higher fungi, the felt 
tissue within as a sort of pith, the parenchymatic without, form- 
ing a rind. 
The development of this tissue differs strikingly from that 
of phanerogams and higher cryptogams. The lasting tissue is 
not derived from any specialized meristematic cells, and the only 
intimation of a division of tissues into systems is that seen in 
the difference between the felt tissue and the firmer outer rind. 
The cell walls vary in thickness, seldom show striation, and 
are composed of a substance slightly different from pure cellu- 
lose, inasmuch as it does not give the cellulose reaction until 
it has been treated with strong potash, or some other similar 
reagent. The protoplasmic contents show a low degree of dif- 
ferentiation ; until quite recently no nuclei had been dis- 
covered. It is now believed that they are not infrequent. 
Vacuoles and a number of unorganized substances are numer- 
ous, but nothing lke chlorophyll or starch grains appears. 
Crystals of calcium oxalate are sometimes present, but these 
more frequently form a crust on the outside. 
2. pae: 
The lowest forms are one-celled like the low fungi, and like 
them they live singly or in colonies. The latter develop either 
by the union of cells originally separate, or by cells dividing in 
such a manner that while each new cell has its own separate 
wall, the wall of the original cell surrounds all those produced 
by it. These walls are of pure cellulose and in many instances 
show regular striations; for example, in Gleocapsa. 
The multicellular forms consist of cell-rows (filaments), cell- 
surfaces, and cell-bodies. These vary greatly in their mode of 
development. Certain filamentous forms have no localized 
centres of growth, but increase in size by the growth of any or 
all the cells composing the plant. Other more complex forms 
