NEW LABOULBENIALES. 699 



posed about a central, terminal, rounded, tongue-like median projec- 

 tion formed by the symmetrically appressed lips. Spores 28 X 4 /x. 

 Perithecia; basal and stalk-cell region 18-20 X 32-35 ju, venter 

 75-82 X 42-47 /x; neck, tip and apex 66 X 46-54 /x. Appendage 

 45-50 X 8-9 M, its stalk-cell 16-18 X 8 n. Receptacle 72-156 X 

 23-28 M- Total length to tip of receptacle 225-310 m- 



On the superior surface of the abdomen of Sigaloessa sp. No. 1713, 

 Mandeville, Jamaica, W. I. 



This species is well characterized by the prominent spiral elevations 

 on the venter, by its peculiar termination and the arrangement of its 

 antheridia which are superposed in a single series, and arise from 

 relatively very small cells. The appendages in all of the seven speci- 

 mens examined lie flatwise against the perithecium, so that its free 

 side view is visible in no instance, and it has not been possible to de- 

 termine whether the uppermost antheridium is spinose. 



Stigmatomyces Leucophengae nov. sp. 



Short and stout, pale dirty yellowish, the perithecium somewhat 

 darker. Basal cell of the receptacle stout, tapering slightl}- below, 

 hardly twice as long as broad; the subbasal irregularly five-sided, 

 owing to its oblique separation from the stalk-cell of the appendage, 

 the anterior margin half as long as the posterior, which is intruded 

 below; the distal margin oblique and more or less strongly convex. 

 Stalk-cell of the appendage as long as or longer than the receptacle, 

 the upper cell of which it slightly overlaps, abruptly prominent below 

 the appendage, which is slightly and abruptly constricted at the base, 

 and consists of four superposed subequal cells, each bearing a single 

 rather large antheridium on the inner side; the series ending in an 

 erect terminal antheridium, bearing a large brownish spine externally; 

 the basal cell not differentiated in color from the rest, hardly larger, 

 and bearing no antheridium. Stalk-cell and secondary stalk-cell of the 

 perithecium parallel, of about equal length; the latter somewhat 

 larger, their upper margins horizontal and irregularly continuous: the 

 three basal cells above subequal; the outer irregularly concave ex- 

 ternally: venter long, straight, of about the same diameter throughout, 

 wall-cells separated by a more or less distinct furrow distally, and each 

 ending in a broad prominence; the four prominences surrounding the 

 base of the neck; which diverges usually at an angle from the venter, 

 is short, hardly longer than broad, and indistinguishable from the tip, 



