THAXTER. NEW LABOULBENIACEAE. 25 



appendage and the perithecia. Antheridium distally broadened and 

 truncate, elongate ; the stalk-cells about equal and about one half the 

 length of the body of the antheridium or somewhat longer than this ; the 

 basal cells unequal ; the cells of the two middle tiers, and their antheridia, 

 clearly distinguishable ; the terminal cells forming four unequal, rounded 

 prominences, the upper inner angle of each cell separated by an almost 

 vertical septum to form the four " guard cells," that terminate in papillate 

 prominences just below which they proliferate to form the characteristic, 

 erect, sterile appendages, all four of which do not always develop; the 

 sterile appendages relatively short, two to three-septate, tapering to a 

 blunt point, distinctly inflated above the slightly constricted base. Peri- 

 thecium relatively large, straight or slightly curved, somewhat inflated 

 below, tapering gradually to the rather short, moderately well distin- 

 guished tip ; the apex bluntly rounded, the basal cells relatively small ; 

 the stalk-cell variably developed, its distal end usually somewhat broader 

 than the basal cells collectively, sometimes more than half as long as the 

 body of the perithecium. Spores about 50-55 X 4-5 ft. Perithecia 

 130-185 x 35-55 ^ the stalk-cell 35-100 X 18-25^. Antheridia 70- 

 75 x 22 /j, its appendages 45-50 p. Receptacle about 35 x 28 p. 

 Greatest general length and width of largest individual 350 X 300 ^. 



On Aleochara rujipes Boh. Derema, Usambara, East Africa. Berlin 

 Museum, Nos. 844 and 845. 



EUHAPLOMYCBS nov. gen. 



Receptacle consisting of two cells, the upper bearing a free stalked 

 antheridium and a stalked perithecium. Antheridium conical, consisting 

 of a single stalk-cell followed by a basal cell from which is separated 

 a group of smaller cells some of which (two or four ?) extend upward 

 and inward to form antheridial cells : above these follow three external 

 marginal cells, the lowest of which lies beside the antheridial cells; the 

 uppermost succeeded by a conical chamber terminating in a pore, and 

 extending downward along the inner sides of the marginal cells to form 

 a cavity into which the antheridial cells empty. Perithecium resembling 

 that of Haplomyces and having two ascogenic cells. 



Euhaplomyces Ancyrophori nov. sp. 



Receptacle small, the basal cell somewhat longer, nearly hyaline, 

 tapering to the relatively small foot; the subbasal cell becoming pale 

 amber brown. Antheridium, including its short stalk-cell, about as long 



