688 THAXTER. 



Port of wSpain, Trinidad, B. W. I. ; the material derived from numerous 

 individual hosts. 



A form growing on a somewhat larger species of Discoccrina from 

 Balaclava, Jamaica, No. 1847, is larger and more slender, the total 

 length reaching 235 fx, the receptacle 85 /x- The distal portion of the 

 perithecium lacks the characteristic double elevation, and the recep- 

 tacle is of a nondescript type. It can however hardly be assigned to 

 any other species. The present form is perhaps most nearly related to 

 S. pauperculus from which it differs in the form of its perithecium and 

 receptacle while it also lacks the deeply colored contrasting basal cell 

 which distinguishes the appendage of the papuan form. 



Stigmatomyces Caribbeus nov. sp. 



Pale, slightly sigmoid. Receptacle tapering slightly throughout, 

 the basal cell shorter and more or less distinctly curved: stalk-cell of 

 the appendage almost a pointed oval, its point slightly overlapping the 

 subbasal cell, its protruding outer margin evenly curved throughout, 

 the insertion broad. Appendage tapering, consisting of three cells, 

 bearing six relatively large antheridia directed sidewise, a terminal one, 

 two each from the basal and subbasal, and one from the upper of the 

 three axis-cells; the subbasal cell relatively large, longer than the 

 basal, its margin evenly convex, that of the smaller third cell somewhat 

 less so. Cells of the basal cell region subequal, the stalk-cell somewhat 

 larger and triangular, the outer basal cell and the secondary stalk-cell 

 both protruding independently and conspicuously, especially the 

 former, which bulges beyond the base of the venter. Venter straight, 

 pale, the wall-cells ending in a corresponding number of clearly de- 

 fined, distal, somewhat asymmetrically placed elevations, which serve 

 abruptly to distinguish the abruptly spreading base of the neck; which 

 is otherwise rather stout and nearly uniform, usually more or less 

 strongly curved outward, hardly distinguished from the tip and apex; 

 which are but slightly if at all narrower, or may be even slightly 

 inflated distally, the distal margin of the almost equally broad apex 

 often flat truncate, or slightly asymmetrical when viewed sidewise; 

 the lip-cells forming inconspicuous flattish papillae. Spores about 

 30 X 3 M- Perithecia 122-140 m; the venter 70 X 32 m; the neck 65- 

 70 X 10-12 n. Appendage 40-50 /x. Receptacle 70-100 X 15-20 fi. 

 Total length to tip of perithecium 210-265 /x. 



On the abdomen of species of Discocerina. No. 2518, (Type), 



