'I'll WTMR. — 



MOXOC.RAIMI OK Til 10 LA HOU LHKX I AC EM. 



299 



conical protuberance within it: all the cells rather thin-walled. Spores 15 X 4 /<. Perithecia 70 X 

 30-35 ft, the stalk-cell 12 18 X 9. Receptacle 20 30 /<. Free appendage 32-30 ft. Tot*} length to 

 tip of perithecium 1 10 /<. 



On elytra, prothorax, and legs of Atomaria sp., Kittery Point, Maine, June. 



This species, which has been found but twice, is distinguished by its hunched bent form and pale 

 straw-color. The venter of the terminal antheridium is usually so small, or SO obliquely placed as to be 

 almost indistinguishable, and the terminal cell of the appendage might readily he taken for it. On a very 

 minute brown Atomaria at Cutts Island. 



Acompsomyces Atom arms Thaxter. Plate XLII, figs. (5-9. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 22. June, 1902. 



Colorless or very faintly brownish. Receptacle short, the distal cell squarish; the basal cell twice 

 as large, narrow below, bulging beneath the base of the antheridial appendage from which it thus appears 

 to arise terminally. Basal cell of the antheridial appendage rather long and narrow, not distinguished 

 from the receptacle, to the distal cell of which its lower half is closely applied, while its upper half is in 

 equally close contact with the stalk-cell of the perithecium; the rest of the appendage free, compact, 

 slightly inflated, with evenly curved outline, faintly tinged with brown, consisting of three cells: the 

 lower subtriangular in outline with the largest angle outward, bearing distally three closely appressed 

 antheridia neither of which arises from its outer side; the cell next above somewhat larger, sterile, sub- 

 triangular with the largest angle external; the terminal cell smaller, separated by a horizontal septum 

 from the terminal antheridium, the neck of which is curved inward, the spinous process conspicuous and 

 external. Stalk-cell of the perithecium well developed, rather slender, about as long as the receptacle, 

 the basal cells well distinguished: body of the perithecium narrower below, its inner margin nearly straight 

 with slight constrictions at the septa, the outer bulging distinctly and more or less symmetrically; the tip 

 distinctly but not abruptly distinguished, short, stout, slightly but rather abruptly expanded below the 

 flat-conical apex, from the middle of which project abruptly the small short appressed prolongations of 

 the lip-cells, forming a terminal apiculus. All the cells thick-walled. Spores very slender, 44 X 3 ft. 

 Perithecia 36-40 X 25-30 the stalk-cell 25-30 X 10 fi. Receptacle 25 ft. Free appendage to tip of 

 spinous process 3G X 12 ji. Total length to tip of perithecium 125-150 //. 



On elytra of Atomaria ephippiata Zimin., Kittery Point, Maine, and Intervale, N. H. 



POLYASCOMYCES Thaxter. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 414. April, 1900. 



Receptacle consisting of two superposed cells, the upper bearing a perithecium laterally and an ap- 

 pendage terminally. Appendage consisting of a series of superposed flattened cells, surmounted by a 

 dome shaped portion which is not persistent. Perithecium with a distinct stalk-cell and well developed 

 basal cells, the supporting cell and the lower wall-cells forming a funnel-shaped ascigerous area, the asei 

 arising from very numerous ascigerous cells. 



It has not been possible from the material available to determine what the precise nature of the 

 antheridial appendage is, or even to decide whether the antheridia are compound or simple. The termi- 

 nal dome-shaped portion of the appendage may have been a compound antheridium, which early becomes 

 collapsed and disorganized, and I was at first inclined to consider it as such; but it is equally possible 

 that it may have given rise to simple antheridia, or that these may have been produced from some of the 

 cells below in a fashion somewhat similar to that seen in Acompsomyces and Acallomyccs, to the last of 

 which it seems otherwise as closely allied as to any of the genera. It has therefore seemed best to place 

 it among the Laboulbeniacere although, such a disposition must be considered as merely provisional. 

 The genus is chiefly remarkable for the unusual multiplication of aseogenic cells, which are far more 

 numerous than in any other. The original position of these cells is probably not that which is shown 



