EXTRA-AMERICAN LABOULBENIALES. 715 



the tip slightly darker; the apex slightly narrower, paler, tapering 

 very slightly; the outer lip-cell darker purplish brown, spreading 

 slightly distally to form an oblique snout-like termination. Spores 

 about 25 X 2.5 )U. Perithecium 55-68 X 15-18/1; stalk- and basal 

 cell region 35-50 X 15 yu. Appendage about 50 /t, its longest branch- 

 lets 40 X 6.5 (X. Total length to tip of perithecium 100-120 jjl. 



On the superior surface of the abdomen, near the tip, of Ilythea sp. 

 No. 2643, Kamerun, West Africa. 



This form is not nearly allied to any of the described species. 

 Among those which, as in this instance, lack a trigger organ, Ihjthe- 

 omi/ccs major perhaps approaches it most nearly; but it is very clearly 

 distinguished by the peculiar form of its punctate perithecium and its 

 snout like termination formed by the protrusion of the wholly suffused 

 outer lip-cell. The specimens examined are mostly paired so that the 

 details of the appendages, two of which are thus juxtaposed, is diffi- 

 cult to make out in detail. The upper branchlets are peculiar for 

 their narrower deeply suffused bases, and curved or winding hyaline 

 terminations. The androphorous cell is unusually large and prominent, 

 as is the sterile branch developed from it. 



Ilytheomyces Kamerunensis nov. sp. 



Basal cell relatively large, wholly hyaline, four sided, bulging 

 strongly externally; subbasal cell subtriangular, much smaller, bulg- 

 ing somewhat externally and becoming edged with black below and 

 externally, the blackening continuous with the foot. Appendage 

 much as in /. Saraivakmsis, the branchlets slightly stouter, the basal 

 and subbasal cells much smaller and indistinguishable, the antheridia 

 paired, stout, straight and brown; several well developed secondary 

 branches arising from the upper side of the successive cells of the 

 main axis, which is somewhat more divergent. Stalk-cell of the 

 perithecium small and narrow, wholly opaque; the basal cell region 

 above it hyaline, abruptly much broader, monstrously developed, 

 becoming much longer than the perithecium proper; slightly curved 

 outward, of nearly uniform width, or slightly broader distally; the 

 secondary stalk-cell black-edged just above the much narrower stalk- 

 cell, occupying approximately the lower two thirds of the region, and 

 distinguished from the outer basal cell above by a well defined in- 

 dentation; the inner basal cell extending to its base, its upper half 

 concealed by a slight general twist of the region which is continued by 



