EXTRA-AMF.RIC.VN LABOULBENIALES. 723 



On Borboridac 



Stigmatomyces affinis nov. sp. 



Hyaline below, pale yellowish above the stalk-cells; of rigid habit, 

 straight or but slightly curved. Receptacle tapering from apex to 

 base, the basal cell mostly somewhat longer, a smoky brown suffusion 

 just above the small foot. Stalk-cells of the appendage and perithe- 

 ciuni lying side by side in a horizontal series, not differing greatly in 

 size, the secondary stalk-cell slightly smaller and higher; that of the 

 appendage strongly rounded outward below the insertion, otherwise 

 nearly straight externally; the axis of the appendage externally 

 convex, consisting of usually eight cells; which are externally convex, 

 somewhat obliquely superposed, and similar, except the small distal 

 and the broader flattened amber-brown basal cell: the antheridia 

 appressed, turned inward or sidewise, one from each cell (or two from 

 the lower?) ; the upper three or four usually proliferating into short, 

 stout, septate, simple filaments. Basal cells of the perithecium 

 similar, extending above the base of the ascigerous cavity, the inner 

 not extending lower than the outer: ^■enter rather short and stout, 

 more or less abruptly inflated just below the middle, above which it 

 is concave below four variously conspicuous protrusions corresponding 

 to the extremities of its four wall-cells ; the neck thus abruptly differ- 

 entiated, stout, tapering throughout to the short, abruptly slightly 

 narrower tip and apex; the latter externally concave below a slight 

 externally divergent, rounded termination, formed by two lip-cells, 

 and subtended on the inner side by two papillae. Spores about 25 X 

 3.5 /i (in perithecium). Perithecia 95-105X28-32//. Appendage 

 about 50 fjL. Receptacle 35-50 X 16 /jl. Total length 150-175 /jl. 



On a minute species of Limosina. No. 2290, Kamerun, West Africa. 



This species is most nearly allied to S. Papuanus, but seems clearly 

 distinguished by the character of its perithecium and the position of 

 its stalk-cells. The apex of the perithecium is similar to that of S. 

 jiapnamis, but its terminal projection is relatively smaller, shorter and 

 more rounded, and the subtending inner papillae are less prominent. 

 Stigmatomyces Plafoisis Speg. (Revision de las Laboulbeniales 

 Argentines, p. 677, fig. 208) approaches this species very closely but 

 the figure and description are hardly sufficiently detailed to make 

 an exact comparison. The two may prove variations of a single 

 species. 



