MONOGRAPH OF THE LABOULRKNIACF.'E. 209 
of them; and it seems certain that they do not thiiss act as hrushcs for the more con- 
venient transfer of these bodies. In general tlie ultimate filamontons sterile branches, 
or branchlets, consist of a single scries of superposed cells ^Yhich appears to elongate, 
at least in so far as I have been able to determine, through the successive division of 
the terminal cell. 
One curious structure, the significance of \vhich is as yet undetermined, should bo 
mentioned before leaving the sterile portions of the appendages. This structure con- 
sists of a sphie-like process laterally developed from the primary npprndago, and lias 
been observed in only a few instances. It is most pronounced In an apparently 
undescribed genus parasitic on Tachimts pallipes, which has not yet been found in a 
mature condition. It also occurs in Sphderomjces Lnthrohii [Vhite XT, fig. 19) and in 
Ehadmomyccs cristatus (Plate IX, fig. 22), in both of which it seetns to disappear at an 
early period. The process which is persistent at the summit of the antheridium in 
Haplomyces may also be of a similar nature. 
Male Sexual Organs. As has been previously mentioned, the es'^ontlal f unci ion of 
the appendage, apart from the secondary function of profootion which it undoubtedly 
subserves in many cases, Is as a rule connected with the production of the male sex- 
ual or"-ans; although in the following genera, Amorphoniyces, Dimorphomyces, 
Dimeromyces, Enarlhromyces, Peyritschiella, and Dichomyces (probably also in 
Chitonomyces and Ilydrasomyces), the latter are wholly independent structures un- 
connected with the sterile appendages which usually accompany them. 
A comparison of the character of these male organs in the different genera 
makes it apparent that they afford the best, indeed the only basis for the natural 
•ouping of the members of the family as a whole, which are thus dis- 
sep 
o 
ished into two main categories : one including those forms having ma 
from which the male elements are produced exogenously ; the other including those 
forms in which the male element arises endogenously. Of these groups the first may 
be further subdivided, on a similar basis, into form.s in which the male organs are 
borne on specialized male individuals, and those in which the sexes occur together 
on the same individual. Again, as will be seen presently, these monoecious and dioe- 
'ouns are further distiniruished accordino- as the male organs are simple or 
cious g 
D _ - _ _, 
pound; while their relative position, distribution, etc., afford opportunities for 
subd 
Since they are undoubtedly homologous with similar structures in the Fioridens, 
the male organs and male elements in the Laboulbeniaceaj may be properly designated 
as anihmdia and anihcrozoids, respectively ; the former, as will be seen, consisting of a 
u 
