404 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Stigmatomyces Hydrelliae nov. sp. 



Venter of the perithecium amber brown, oval, the wall-cells becoming 

 separated by well-defined, slightly oblique longitudinal broad ridges, 

 which become broader distally where they end abruptly ; the neck pale, 

 well distinguished, its middle third prominently inflated, more so poste- 

 riorly, and separated from the usually abruptly bent tip by a constric- 

 tion ; the apex rounded, one of the (lateral?) lij>cells forming a slender, 

 bluntly pointed, well-defined free projection. Stalk-cell of the appendage 

 sub-triangular, somewhat prominent below the basal cell, which nearly 

 equals it in length, sterile ; the fertile cells above it nearly equal, bearing 

 rather large, apparently single, antheridia, with stout, straight necks, the 

 series ending in a terminal spiniferous antheridium. Receptacle hyaline, 

 the two cells nearly equal in length, the lower tapering below, the upper 

 broader inflated, its diameter greater than the base of the perithecium 

 and stalk-cell combined, so that the latter region appears to be con- 

 stricted. Spores 2S X 2 fj.. Perithecium : venter 50-55 X 33-40 /x • neck 

 40-43 /A. Appendage 50 /a, the stalk-cell 18 ^u. Receptacle 55-65 X 

 20-22^. Total length to tip of perithecium 150-185 yit. 



On the superior surface of the abdomen, sometimes on the legs of 

 HydrelUa sp. Kittery Point, Maine. Occurring in scattered groups. 



Stigmatomyces purpureas nov. sp. 



Becoming wholly suifused with purple. Venter of the perithecium 

 inflated toward the base, ta[>ering distally ; the four wall-cells separated 

 by a corresponding number of prominent longitudinal ridges, rounded in 

 section, which run spirally, making in well-developed individuals a whole 

 half turn about the venter, and becoming sometmies lobulated through 

 the presence of successive constrictions and enlargements ; neck not 

 abruptly distinguished, except by the abrupt elevations which form the 

 terminations of the longitudinal ridges of the venter, rather slender, an 

 abrupt posterior subterminal elevation preceded by a slight constriction, 

 the tip distally quite hyaline ; the aj^ex becoming furcate through the 

 presence of an anterior (shorter) and a posterior projection. Stalk-cell 

 of the appendage relatively small, but slightly prominent below the basal 

 cell, which is nearly as long, sterile, and, as a rule, followed by three 

 cells bearing antheridia singly or in pairs, the terminal one spiniferous. 

 Receptacle usually straight, the cells nearly equal or the upper larger. 

 Spores 35 X 3 /x. Perithecium : venter 80-100 X 45-50 /x ; neck SO- 

 83 |U. Appendage 55 u, the stalk-cell 18 /x. Receptacle 100-120 /x. 

 Total length to tip of perithecium 200-325 ^u. 



