214 MONOGRAPH OF THE LABOULBENIACE^. 
m 
pens, the production of antlieiiclia is greatly increased (Plate II, fig. 8). Further ref- 
erence to this circumstance will be made in connection with the '* abnormal forms" 
described below. 
Turning to the compound tij'pe of antheridlmn we find much less uniformity than in 
the simple type just described, although the antheridial cells which make up the essen- 
tial portion of this organ are practically identical with the sini 
As has been already mentioned, these cells seem to be intercalaiy in origin as far as 
can be determined in the absence of a knowledge of their early development 
and instead of being wholly or partly free, both the necks and venters are closely 
united below, beside or around a common cavity into which they discharge. Of the 
twenty-seven genera thus flxr described, about one-third are characterized by possessing 
this compound type of antheridium, and since that occurring in Dimeromyces is one 
of the largest and most easily studied, it may b 
genus the species are dioecious, and the male indi 
In this 
lifferen- 
tiation, being as w^ell developed as the female, and bearing more .than one anthe- 
ridium (Plate 17, fig. 16), which possesses a stalk-cell and four basal cells lying below 
the antheridial cells. The antheridial cells in this case are six in number, symmetri- 
) and emptying through long narrow 
illy 
o 
o 
flated base of the long and slender " secondary 
which serves as a common medium for the final discharge of the products of all the 
dial 
cells. The latter here correspond closely to those previously described in 
connection with the simple antheridia, and the formation from them of anthcrozoids is 
also similar in all respects. The canal, however, does not enlarge, as in the simple 
form, immediately after leaving the venter; but continues about the same diameter 
1 
has nearly reached the general cavity at the base of 
ds slightly. As a result, the anthcrozoids remain in connection with the p 
1 
plasm of the venter till they project some little distance into the cavity of the sec- 
ondary neck, eventually separating from it and fallin<r free into this creneral 
ptacle 
o '^"•-' o 
r 
3presented in the figure, they may be seen at various poin 
Tnakmg their way out. The antheridium of Dimorphomyces is essentiallv identic 
^vith that just described, ih^ male individual in this genus, however, producing but 
Single antliendium (Phite Y, figs. 8-9 and 14-15). In Pcyritschiella (Plate 11, fi 
12j, Dichomyces and Enarthromyces (Plate III, fig. 10) 
;il 
a 
o 
d 
hat different in form, the secondary neck being less prominent and less 
abruptly distinguished, its g 
P 
tially the same ; the four 
six antheridi.1 cells in the last mentioned genus lying somewhat obliquely side by 
