24 PROCEEDINGS OP THE AMERICAN ACADEMY. 



bearing a spine-like process and becoming converted into a simple 

 antheridium, the subterminal-cell cutting off a cell laterally which be- 

 comes an antheridium, the remaining cells sterile. Perithecium stalked, 

 normal in structure. 



A genus of very simple structure, closely allied to Acompsomyces, from 

 which it differs chiefly from the characters of its antheridial appendage. 



Acallomyces Homalotae nov. sp. 



Hyaline, becoming faintly tinged with straw color. Receptacle very 

 small, the lower half becoming tinged with smoky-brown ; the basal cell 

 hardly distinguished from the foot and commonly obliterated by a thick- 

 ening of the walls in this region, so that the receptacle appears to be 

 one-celled. Basal cell of the antheridial appendage separated from the 

 distal cell of the receptacle by a somewhat oblique septum, and nearly 

 similar to that of the stalk-cell of the perithecium, to which it is closely 

 united on its inner side ; the subbasal cell very small, and becoming 

 scarcely distinguishable in mature individuals ; the two cells above it 

 similar, rather distinctly differentiated, the pair forming a slight sym- 

 metrical enlargement; the subterminal cell above larger and longer than 

 these two combined, the base of the antheridium extending its whole 

 length ; both this and the terminal antheridium above it relatively large, 

 the necks very long, straight, or but slightly bent, and somewhat diver- 

 gent. Stalk-cell of the perithecium somewhat broader than long, the 

 basal cells small, the perithecium proper relatively large and somewhat 

 inflated above the base, distally tapering gradually to the tip ; the 

 lip-cells forming four corresponding projections, the anterior larger and 

 broader, the posterior narrow and bluntly pointed, subtended by a more 

 or less well-defined hump, the two lateral usually shorter, blunt, slightly 

 divergent, sometimes not clearly differentiated, varying in shape and 

 position. Spores 35 X 3.5 /i. Perithecia 75-95 X 25-32 /*, the stalk- 

 cell 10-12 p. Appendage, above basal cell to tip of terminal anther- 

 idium, 36 fi. Antheridia 21-25 /x. Receptacle 20-25 p. Total length 

 to tip of perithecium 125-150 /x. 



On the superior surface of the abdomen of Homalota sp. ; Intervale, 

 N. H. Apparently very rare. 



Stichomyces Stilicolus nov. sp. 



Hyaline, becoming tinged with yellowish, the perithecia becoming pale 

 amber-brown. Subbasal cell of the receptacle about twice as long as the 

 basal cell ; the stalk-cell of the perithecium and that of the appendage 



