MONOGRAPH OF THE LAHOULBEXIACE.E. 213 
Helinintlioplmna. there are four rows svnimetrically arranired (Plate VIII, fig. 10) 
appe 
a 
In all these cases the aiitheridial cells are themselves b 
lets from the axis of the appendage. In Khadinomyces and Coretliromyces, how- 
ever, the entire axis of the autheridial branch is formed from the superposed venters 
of the antheridial cells, the necks alone being fiec and projecting in a vertical row 
(Plate IX, figs. 5, 9, and 14). 
In Te 
brouirht about throut^h the re- 
peated sympodial branching of the appendage, the false branchlets (Plate X, li 
6 and 11) being either antheridia or short sterile outgrowths, terminated by a char 
o 
beak-like cell. Althou"'' 
of andierid 
o 
cells, either alone or mingled with sterile branchlets, is produced, the type is not 
strictly comparable with that of the previously mentioned instances; in which the an- 
theridial cells or branchlets originate as a result of the septntion of an axis already 
formed and the production of monopodial branchlets from the resultant cells. In 
Teratomyces it is evident that the serial arrangement is necessitated 1>y the relative 
position of the crowded appendages. 
In the second category may be included all the remaining genera, comprising 
foruis in all of which the simple antheridia are not thus disposed in reg 
but are more or less irregularly placed on the appendages. Although never serially 
d throucrh monopodial branching, individual examples occur, however, in which 
O^^ J-, 
the o-rouping of the antheridia is very characteristic and specifically 
Among the instances included in this general category, Laboulbenia is by f\ir the best 
illustration, since it comprises a greater variety of forms than any other genus. 
Among 
finite relation in position b 
Laboulhenia clongda or L. rUrostichi may be mentione'd, while among forms m win 
there is a more definite grouping, Laboulbenia variabilis (Plate XXI, fig. 3) or X. p. 
lifcrans (Plate XYII, fig. 23) offer the best examples of more or less regular and d 
characteristic clusters. Species in wliich the antheridia are borne in pairs, 
tiy 
ly o-rouped, are common ; while in one instance, the curious L 
(Plate XVII, fig. 3), a single short series may result, as in Teratomyces, from continued 
sympodial branching. 
In re<rard to the number of simple antheridia that may occur in individual cases, 
may b 
oned that there are often wide differences, not only between diffe 
species, but between individuals of the same species. Lahoiilbema texuna, for mstanct 
(Plate XX, figs. 16-18), has one, rarely two, antheridia, while X. clou(/ala may liav( 
from five to fiftv or more. Wherever fertilization has failed, as not infrequently hap 
T. 
i 
