744 THAXTER. 



On Ortalidae. 



Stigmatomyces Ortalidanus nov. sp. 



Very long and slender, straight, or but slightly curved. Basal 

 cell of the receptacle tapering to the small foot, usually slightly bent 

 below, with secondary thickenings of the wall which usually become 

 blackish brown, the suffusion sometimes extending so as to stain the 

 yellowish primary wall ; subbasal cell more than twice as long, slightly 

 narrower than the basal, just above the horizontal septum; hyaline, 

 or yellowish, usually straight, thick-walled and nearly isodiametric. 

 Stalk-cell of the appendage extending only to the subbasal cell, 

 relatively narrow, its outer margin nearly straight, except for a slight 

 elevation below the insertion, which occupies almost the whole of its 

 distal surface. Appendage long, slender and distally attenuated, 

 consisting of about eight to ten axis-cells; the basal amber-brown, 

 broader than long, its upper margin somewhat oblique below a small 

 subtriangular hyaline cell which is separated from it distally and bears 

 two superposed antheridia; the cells above the fifth usually somewhat 

 longer and flatter than those below; all the axis-cells hyaline, and 

 producing two antheridia each, arranged in a double series; the necks 

 of the lower in each turned slightly sidewise, and of the upper, outward ; 

 the appendage ending in two superposed antheridia, below which the 

 last cell of the axis is often also transformed into two superposed 

 antheridia. Stalk-cell region of the perithecium much elongated; 

 the primary stalk-cell greatly enlarged, thick-walled, hyaline, extend- 

 ing far above the insertion of the appendage, its distal fifth to third, 

 or even more, overlapped by the bluntly pointed base of the much 

 smaller, long-triangular secondary stalk-cell, the upper margin of 

 which is horizontal, with an external brownish thickening; basal 

 cells relatively elongate, the inner sometimes extending down nearly 

 to the middle of the secondary stalk-cell ; none of the basal cells over- 

 lapping the ascigerous cavity, but this region slightly broader than 

 the base of the venter, owing to the presence of distal brownish thick- 

 enings in each cell. Venter becoming tinged with brownish yellow, 

 more than three times as long as broad, straight, nearly symmetrical, 

 very slightly inflated, its extremity tapering slightly to the base of the 

 concolorous neck; which is not otherwise distinguished, straight, 

 slightly and evenly tapering throughout, the wall-cells slightly twisted, 

 as are those of the venter, and becoming more or less evidently corru- 



