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MOXOGRAPII OF THE LABOULBLXIACE^E. 207 
such liiglily developed forms as are present in Zodiomyces (Plate XXITT) in \\liich it 
attains its maxiiiuim development as compared ^villi otiier known ircnera of the gronp. 
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Other multicellular forms may be illustrated hy such genera a? ChaMomj-ccs or Enar- 
thromyces (Phite XI, fig. 20 and IV, fig. S), in Avliich it consists of a single row of super- 
posed cells, and Rhachomyces (Plate XII), in which, from a similar simple axis a 
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series of appendiculate cells is cut off on one side, the predomiuruice of transverse 
divisions resulting in an elongate form. As an ilhistratioii of tljo reverse condition 
where a predominance of longitudinal divisions is proseut, genera like Dichomyccs or 
Diplomyces may be mentioned, in which the habit is stout and couijiMct, this type 
reaching its greatest complication in the genus Zodiomyces just referred to. 
Although the number and arrangement of the cells wliicli form tlie rccoptacle in a 
given genus is often very constant, this is by no means invariably the case ; and, even 
in the same species, fixity in this respect does not always exist. In Pcyrilschiella, for 
example (Plate VI), although the individuals of a given speci<"< do not vary greaily, 
in so far as the number and arrann;ement of the cells is concerned, no two si>eci(«s are 
alike in this respect. Th 
degree in Khachomv 
(Plate XII), a genus wliich is further remarkable from the fact that the main body 
' of the receptacle is in the nature of a lateral proliferation from the sul)-l)asal cell of 
what may be termed the primary receptacle, as well a^ from the fact that this pro- 
[ly be once or several times repeated, as will be presently 
A. 
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may be wide variations in this respect, not only between difT'crcnt 
the 
species, but in individuals of the same species ; while m other mstanccs m tins gc 
the number and arrangement of the cells of a given species may be invariable. 
In the simple as well as in the more complicated forms, the receptacle is more or 
flattened, usually in an antero-posterior plane, the side bearing the appendage in 
mature individual being considered for convenience "posterior," where this distinc- 
tion is possible. In some instances, however, the flattening is in a plane at right 
anoles to that just mentioned, as in Dichomyces and Diplomyces. In a majority of 
instances this flattening is well marked; but it is most pronounced m forms which 
have a distinctly 
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Appendages. With but a single exception m the whole group 
. L^.^ • ,„^ ,.To« fr» r^iin nr morp nunendaiTes wliich, though 
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as a rule, clearly distinguished from it, a.s well as from the perithecium. Ihese nppe 
da^^es, though extremely variable, and affording, in many cases, excellent specific d 
tinctions, are chiefly important from the fact that they are, with few exceptions, a. 
ciated with the production of the antheridia or male sexual organs of the plant. 
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