678 THAXTER. 



and 1874, Balaclava, Jamaica. Nos. 1812 and 1813, Fayetteville, 

 Arkansas. 



In general appearance this small and rather insignificant form 

 resembles S. Ochtheroideae and <S. humilis, but differs in its three 

 celled appendage, spiral wall-cells and in other details. The material 

 from the West Indies and from Arkansas is abundant, and does not 

 differ essentially. 



Stigmatomyces indentatus nov. sp. 



Receptacle uniformly hyaline or faintly yellowish, usually straight, 

 and often tapering from its rather broad distal end to its narrow base, 

 the septum very slightly oblique, and associated with a variably dis- 

 tinct slight indentation; the two cells nearly equal, or the subbasal 

 much longer, in which case it is of nearly uniform width through- 

 out. Stalk-cell of the appendage dark amber-brown and strongly and 

 abruptly concave externally, yellow on its inner side, inserted on a 

 shelf-like protrusion of the subbasal cell opposite the distal septum of 

 the latter; its position, in connection with its concavity, resulting in a 

 characteristic constriction or indentation of this region: its distal 

 end but slightly broader, and inconspicuously prominent below the 

 rather broad insertion. Appendage concolorous with the venter of the 

 perithecium and reaching hardly beyond its upper third ; consisting of 

 four successively smaller cells; the basal hardly longer than broad; 

 the three lower bearing each two antheridia, with necks diverging in a 

 double series; the fourth bearing a single one, which is followed by 

 one which is terminal and externally spinose; the appendage usually 

 lying flat against the perithecium. Stalk-cell of the perithecium, and 

 the four cells above it, relatively small, more or less similar; their 

 external margins nearly even, concolorous with the venter of the 

 perithecium. Venter usually somewhat longer than the distal portion, 

 relatively large, straight; its axis bent slightly inward, its surface 

 inconspicuously granular, more clearly so distally, regularly ovoid, or 

 narrower distally, and then slightly broader at its junction with the 

 base of the neck; which is straight or slightly curved, distinctly paler 

 above its slightly spreading base; the tip more distinctly colored, 

 hardly distinguished, one or both of its margins slightly concave, nearly 

 twice as long as the apex; which is almost hyaline, often bent abruptly 

 outward, the lips subsymmetrical, distinct, but not very prominent. 

 Spores 24 X 4 /x. Perithecia 120-147 n; the venter 70-77 X 35-42 m- 



