NEW LABOULBENIALES. 673 



by the stalk-cell of the appendage. The latter relatively short, its 

 base bluntly rounded, its distal end broad, its outer margin slightly 

 concave, distally rather abruptly convex. Region of the insertion 

 rather conspicuously hyaline, nearly horizontal. The appendage con- 

 sisting of three cells, the basal more deeply suffused, concolorous with 

 the stalk-cell, and almost as long, bearing distally and externally three 

 superposed antheridia; the subbasal cell often as long as the basal, 

 narrow, bearing two superposed antheridia which lie almost wholly 

 above it; the third cell half as long, bearing a single antheridium 

 which is followed by two that are terminal and superposed, the eight 

 superposed in a single row, or but faintly suffused, hyaline, concolorous 

 with the subbasal and third cell. Stalk-cell of the perithecium sub- 

 triangular, the distal angle rounded or truncate, hardly longer than 

 it is broad at its base, which occupies the whole distal margin of the 

 subbasal cell of the receptacle; secondary stalk-cell slightly smaller, 

 subtriangular, distally prominent externally, the prominence associated 

 with a peculiar thickening similar to that of the outer basal cell above 

 it, the margin of which is rather abruptly concave; the inner basal 

 cell somewhat narrower, its middle opposite the insertion of the ap- 

 pendage. Venter of the perithecium relatively very long, yellowish, 

 suffused with brown or olivaceous, concolorous with the cells below, 

 but becoming darker; its lower half or more almost symmetrically 

 inflated, tapering gradually to the slightly but abruptly distinguished 

 distal portion of the perithecium, which may equal the venter in 

 length, but is usually somewhat shorter; the whole of nearly the 

 same diameter throughout, except that the tip is very slightly 

 narrower, usually curved outward; the apex not distinguished blunt; 

 the lips coarse and but slightly prominent. Spores about 2S X 3 /z. 

 Perithecia: venter 100-115 X 35-45 /x; neck and tip 90-100 X 16- 

 18 IX. Receptacle 80-95 X 22-26 m- Appendage 75-85 n, its stalk- 

 cell 35 X 16 ;u: its basal cell 28-30 m- Total length to tip of peri- 

 thecium 330-350 /i. 



On Paralimna decipiens Lw., No. 1915, (Type), Porous, No. 1913, 

 Williamsfield; No. 1741 and 1748, Mandeville; No. 1747; Clarks- 

 town, Jamaica. No. 2529, Grand Etang, Grenada; \V. I.: in all 

 cases near the tip of the abdomen. 



This species is not subject to any considerable variation except 

 in color, the olivaceous shade being absent in some of the material. 

 On the legs of the same host, however, occurs a shorter and stouter 

 form, which is not unlike the less well developed types of S. Para- 

 limnae which occur in a similar position, and I have been unable to 



