THAXTER. — NEW LABOULBENIACEAE. 37 



slender, straight, very slightly inflated near the base, with a slight sub- 

 median enlargement ; tapering throughout to the short, truncate, well 

 distinguished tip : the basal cells rather small, concolorous ; the group 

 narrower than the stalk-cell and separated from it by a horizontal sep- 

 tum : the stalk-cell very large, usually elongate, often inflated and thick 

 walled. Spores about 50 X 4 jx. Perithecia including basal cells 240- 

 275 x 40 ( u, the stalk-cell 150-325 X 25-85 /x. Appendages, longest 

 225,0.. Receptacle 100-185 X 14 (base) X 55 (distal end). Total 

 length to tip of perithecium largest, 800 /x. 



On abdomen of Qaedius nov. sp. New Zealand. Sharp Collection, 

 No. 1159. 



ACOMPSOMYCES nov. gen. 



Receptacle two-celled, bearing an antheridial branch terminally and 

 a single perithecium laterally. Antheridium consisting of several super- 

 posed cells from which single simple antheridia are borne directly. The 

 perithecium borne on a stalk, the lumen of which becomes continuous 

 with that of the ascigerous cavity. 



Acompsomyces Corticariae nov. sp. 



Receptacle narrow below, distally enlarged, hyaline ; the subbasal cell 

 • small. Basal cell of the appendage brown, distally narrowed to the base 

 of the appendage proper, which is brown, and consists of three sym- 

 metrical cells, the upper smaller, becoming a terminal antheridium, the 

 lower bearing several antheridia somewhat irregularly. Perithecium 

 brown, rather abruptly distinguished from the short hyaline stalk ; the 

 tip very broad and darker ; the lip-cells forming four hyaline-tipped, 

 nearly symmetrical papillae, which terminate four corresponding ridges. 

 Spores about 30 X 2 u. Perithecia 90 x 26 jx, the stalk 15 /x. Recep- 

 tacle 25 /x. Antheridial appendage, above stalk-cell, and including 

 terminal antheridium, 40 «. 



On elytron of Corticaria sp. Berkeley, California. 



STICHOMYCES nov. gen. 



Receptacle consisting of two cells, the upper bearing one or more 

 stalked perithecia laterally, and an antheridial appendage terminally. 

 The appendage consisting of several superposed cells, the lowest sterile, or 

 having one or two opposite lateral perithecia; those above it bearing 

 opposite lateral branchlets distally, the series ending in a terminal sterile 



