% 
Of,g MONOGRAPH OF TEE LABOULBENIACE.E. 
solitarv,and the receptacle is very greatly reduced, being quite different from that of the female; 
while ill tlie present genus it differs only in its slightly smaller size. The antheridium is almost 
mor 
ame 
and elongate form, and in its free stalk-cell- The perithecium also, when mature, shows the , 
remarkable ahsorptiou of its basal septa which one finds in the last-mentioned genus, its whole 
cavitr from the uoex to the insertion of the stalk-cell, becoming continuous about the time that 
the spores begin to mature. The trichogyne, as far as can be determined from a somewhat im- 
perfect spcchncn (fig. 17), is small and irregularly inflated. 
The receptacle is quite unique in structure, and apparently in development. The material 
available docs not, unfortunately, illustrate the complete development, thei'e being no very 
young stages; but it is evident that the young plant ends with a single primary appendage, 
which is the upper one of tlie scries in the mature individual. Then, by successive divisions 
of the hasul cell of the receptacle, new cells appear to be cut off from its distal end; each of 
which, in its turn, cuts off a small cell, always on the same side, from which the secondary 
aplHiidagcs, the perithecia, and tlje antheridia are directly developed. A somewhat similar 
arrangement of organs is found in the female individual of Dimorphomyces ; but in this case the 
series are twofold and the proliferations terminal from wing-like lateral outgrowths. 
DiMEUOMYCES AFRiCANUS nov. sp. Plate TV, figs. 12-18. 
Male individual brownish. Receptacle consisting of usually seven very obliquely superposed 
cells, from all of which, except the basal, may be developed on the side which is uppermost, a 
sterile appendage or an antheridium in no regular order except that tlio terminal cell always 
bears an appendage. Antheridia rarely more than three, usually two, somewhat flattened, borne 
on a short free stalk-cell, the basal cells small, the six anthcridial cells in two transverse rows 
of three each, the neck long and slender, slightly curved, its base distinctly inflated. The 
appendages simple, rigid, septate, tapering, becomiug blackish brown ; the sub-basal cell somewhat 
constricted and deeply suffused with blackish brown. Antherozoids about 2.5 x .T5/t rod-like. 
Authendia, including stalk-cell, 60 X 10^, the neck, including its inflated base, about 38/.. 
Receptacle, 12a-150xB5^. > /- 
Fcmale^ individual like the male, but larger ; the receptacle usually consisting of eleven cells, 
he antheruha replaced by banana-shaped perithecia, one to four in number, «hort-stalked, 
browmsh; the d.stal end more deeply suffused, and tapering somewhat abruptlv to the broadly 
uncatc apex Spores once septate 75 X 5.5;.. Perithecia, 140-175 X 26-35;., Including stalk- 
cell. Appendages (longer), 17(5-260/.. Receptacle, 120-160 x 35-50/.. 
amrAhe'injVr ^7^''''^ '"" """ '""*' ^" '''' ^P^^'-^"« ^' ^^- host which were 
e or rf cTof ^ "'' "" 'u ""'"'"^'^" '' ^''^^--^ ^-^^' -^ ™d on the 
juiLiioi 5>uiiace or the abdomen near thp hooo r^^ fi.^ i. . . 
to dctennJnP frnr. n V I T\ ^ ^^'"^ posterior pairs of legs. I was not able 
CO attcimiue trora the material wiiether the sexes ahviv«^,.^^; • . , 
of growth it was not nn««;u. .. .....„„ _ „ ^/-ajs g,ow m pairs, s.nee from their position 
insect. It 
m 
to that of the other dioecious forms (Amorphomyces and Di 
§ 
\ 
) 
