414 PROCEEDINGS OF THE AMERICAN ACADEMY. 



38 X 3.0 fi. Perithecia 100-120 X 40-48^. The stalk 34-50 X 25-27 

 fi. Appendages of fertile branch 50-90 X 5 /x. Sterile part of recep- 

 tacle 50-50 /x. Greatest length to tip of perithecium 250-435 /x. 



On Oxytelus alutaceifrons WolL, British Museum, No. 411, Island of 

 St. Helena. On abdomen and elytra. 



Monoicomyces invisibilis nov. sp. 



Hyaline. Basal cell of receptacle small subtriangular, the subbasal 

 cell rather long and narrow, bearing terminally a distally rounded cell 

 from which it is separated by an oblique septum and which is surmounted 

 by a short simple cylindrical appendage ; the fertile branch developed on 

 one side only, not distinguished from the receptacle and its appendage, 

 consisting of two or three obliquely superposed cells extending obliquely 

 upward in a divergent series, the terminal cell bearing a perithecium and 

 antheridium in the usual relative positions, the subterminal cell sometimes 

 apparently producing a second antheridium instead of the simple appen- 

 dage which terminates the lower cell of the series. Perithecium borne 

 on a rather short stout stalk-cell, its inflated basal half not distinguished 

 from the flattened basal cells, its slender distal half abruptly distinguished. 

 Antheridium apparently similar in general to that of the other species, 

 its detailed structure not recognizable in the types. Perithecia 84 X 30 

 iu,. The stalk-cell 20 XIO^. Receptacle, sterile part, about 40 /x. 

 Total length to tip of perithecium 110— 140 /x. 



On Homalota putrescens Woll., British Museum, No. 412, Azores. 



POLYASCOMYCES nov. genus. 



Receptacle consisting of two superposed cells, the upper bearing a 

 perithecium laterally and an appendage terminally. Appendage consist- 

 ing of a series of superposed flattened cells, surmounted by a dome 

 shaped portion which is not persistent (a compound antheridium ?). Peri- 

 thecium with a distinct stalk-cell and well developed basal cells, the 

 supporting cell and the lower wall cells forming a broad base the upper 

 surface of which forms a broad ascigerous area, the asci arising from 

 great numbers of ascigerous cells. 



It has not been possible from the material available to determine the 

 exact nature of the antheridium in this remarkable genus. The terminal 

 dome shaped portion of the appendage appears to consist originally of 

 several cells, but whether it constitutes the whole of the antheridium or 

 whether the latter is represented in part or wholly by the curious cells 



