EXTRA-AMERICAN LABOULBENIALES. 713 



cells relatively large and well defined, one of the latter (?) extending 

 from the stalk-cell to the base of the perithecium and slightly spiral; 

 perithecium concolorous with the secondary stalk- and basal cells, 

 yellow with a tinge of brown, the wall-cells of the venter- and neck- 

 regions slightly spiral, and transversely punctate, the whole tapering 

 with a slight bend to the bluntly rounded apex. Perithecium 60 X 

 22 ijl; including basal cell region SS lu. Stalk-cell 284 X 15 /x distally. 

 Receptacle about 25 X 14 fx. Appendage to tip of terminal branch- 

 lets 350 /i; its lateral branches about 50 fx. Total length to tip of 

 perithecium 355 ^t. 



On a species of Dioj^sis, Killimandjaro, East Africa. 



This very graceful and distinct species was found in company with 

 R. crispatiis on a host kindly communicated by Dr. Speiser. It is 

 most nearly allied to R. confusus. The branches of the appendage 

 are shorter and less curled, and are more remote, tending to diverge 

 in such a way as to appear grouped in threes. The perithecium of the 

 unicjue type is not fully mature, and may perhaps become slightly 

 modified with age, although asci are already formed. 



Rhizomyces Kamerunus nov. sp. 



Cells of the receptacle nearly equal, hardly longer than broad, the 

 subbasal more deeply tinged with brown. Appendage suberect, or 

 usually curved toward the perithecium, its axis indeterminate, con- 

 sisting of from ten to twenty cells tinged with brown, except the 

 terminal ones; the lower darker, especially the smaller basal and 

 subbasal cells which may be nearly opaque; the cells above them 

 slightly longer than broad and bearing each a branch distally and 

 externally, the upper sterile, the rest bearing from their basal cells a 

 hyaline triangular cell from which two or three long-necked brown 

 antheridia arise; the rest of the branch clavate, blackened, except the 

 inner side of its subhyaline somewhat swollen termination, bearing 

 externally and distally two to fi^•e slightly curved branchlets, blackish 

 with hyaline slightly enlarged tips; the successive branches diverging 

 slightly, so that the series as a whole is more or less distinctly two- 

 ranked. Stalk-cell of the perithecium arising terminally from the 

 subbasal cell, usually curved near its base, so that the perithecium 

 diverges more or less strongly, although it is sometimes erect; its 

 base narrower, gradually enlarging to the distal end, subhyaline or 

 becoming tinged above with yellowish brown; the basal cell region 



