ee et 
pak iets 
1896] CURRENT LITERATURE 511 
detailed descriptions, includes the structures generally known as latex and oil 
reservoirs, and vascular hyphe. These contain both plastic and by products 
of metabolism. They are emptied in connection with the formation of the 
fructification. The elements of the conducting system are short club shaped 
cells, or long thin tubes, or very long much branched and anastomosing tubes, 
all multinucleate. They arise as lateral outgrowths from the ordinary hyphe 
and when mature have many connections with them. When the fructification 
is very young they form a dense coil in the center. In rhizomorphs and 
band like mycelia they appear in a similar way. There is no regularity in 
their distribution, but they usually form one or several layers at the margin 
of the stipe and beneath the hymenium. 
Since the earlier researches of Istvdnffi and Olsen, Van Bembeke has 
examined fifty-three species of ten families and Istvdnffi sixty species 
of the three families above named, both European and exotic. The extent of 
these researches justify a classification of the elements of the conducting 
system into six groups, the first five of which include the tubular reservoirs : 
(1) Aymenochaete type, undulate, with pointed ends protruding from the 
hymenium ; (2) wholly internal (only in two species); (3) Stereum type, parallel 
with the surface, bending out into the hymenium, their ends not or scarcely 
swollen: (4) 7helephora type, vertical to the surface, often in several zones ; 
(5) Corticium type, in several layers, the ends cl bbed (keulig aufgeschwollen), 
(6) round reservoirs. 
A considerable number of examples of each of these types are described 
in detail. Istv4nffi thinks the character of the conducting system may be 
used systematically. 
The storage system of tissues includes chiefly the sclerotia. 
To the aerating system are referred the air spaces in the interior of the 
stipe and pileus, as in Agaricinee and Phalloidez, which increase in size 
toward the center. 
~The excretory and secretory system comprehends the structures excreting 
- resin-like materials, reservoirs of coloring matters and poisons, a part of the 
Cystidia (especially those with crystalline contents), and the glandular hairs 
upon the absorbing system of Schizophyl/um spp.— ©. 
