MONOGRAPR OP THE LABHILI}! \I ArE.'F. 229 
\ 
cell (p) and an upper cell (2); while the cell (c) hn^ f»ep!ir;i(e(l Into a lower coll {h\ 
the secondary stalk-cell, and two npper cells (?,i), oidy one of wliich is Pccn in the 
figure;, the second lying opposite it on ilio reverse side. 'J'he two cells (?',?*) nnd 
the cell(*) then continue to grow upwaid around the base of the itriinordial cell of the 
procarpe (r7), and the cell (z) becomes separated into a lower cell (Hg. 17, 0'), (he pos- 
terior basal cell, and an upper cell (n); while of the cells {i, i), one heeomes separated 
into a lower (0) and one upper cell [n), the other into a lower [0) and two upper cells 
{n,n). The two cells (0,0) constitute the anterior basal cells, and thus, togetlier with 
the posterior basal cell (0'), give rise to four cells {n,n), two only of which are seen 
in the optical section (fig. 17). The cells [n, n) in the figure cited have already grown 
up around the base of the primordial cell [d) of the procarpe, the base of which is 
completely enclosed, and is separated from the free portion above as a distinct cell 
(/), tlie carpogonium. In fig. 18, the cells (-o^o') Iiavc also given rise to tlie inner 
series of perilliecial cells wliich develop ns in Sligniatomyces^ and are eventually all 
destroyed. 
The free part above has in the mean time developed a terminal trichogyne 
(/ r), which is separated fiom the carpogonium by the trichophoric cell [c^^). The 
foiu^ cells {n^n) then continue to grow^ upward^ and their upper portion become« 
# 
separated by a septum. This upper portion then in turn divides into an upper and a 
lower part, and the process is repeated several times, until the number of wall-cells 
characteristic of the genus has been produced. During the formation of these wall- 
cells a corresponding development of the inner series of pcrithecial cells, fig. 18 (not 
shown in fig. 17). has taken place, resulting in the formation of the parietal and canal- 
cells previously described, which correspond in number to that of the wall-cells, and, 
like them, are derived as upgrowths from the three basal cells (o, o, and o'). 
The number of wall-cells which occur in a single row is usually four, as in 
Laboulbenia and many other genera, while in Moschomyces, Compsomyccs and a 
few others, the number Is five. As far as I am aware, the genus Ceratomyces (Plates 
XXIV and XXV) is the only one in which the number maj' not only vary in differ- 
ent species, but also in individuals of the same species. In this genus the peritheclum 
attains in some instances a most extraordinary development, and in C. rosfratus the 
number of wall-cells in a single row may reach seventy. These rows of wall-cells 
may be either straight, or spirally twisted, as in Sligmatowyccs Barn, or in some of the 
s]3ecics of Laboulbenia (Plate XIV, fig. 27; Plate XX, fig. 19), and vary in specific 
both in form, relative size, and position. For cxami)le, in the genus T 
the lower members of the series of 
posite the ascogenic 
