180 PROCEEDINGS OF THE AMERICAN ACADEMY 



arise from small cells cut off from the upper corners of the cells of the 

 appendage, more commonly on the inner side, sometimes on both. 

 Rarely a similar fertile branch may arise at the base of the appendage. 



Rhadinomyces pallidus, nov. sp. 



Hyaline becoming yellowish or faintly brownish. Perithecium 

 elongate, distally subcorneal, bluntly pointed. Appendage consisting 

 of three superposed cells, the distal bearing one to three or four stout 

 tapering flexuous branches. Spores 50-55 X 3.5-4 fi. Perithecia 

 110-185 X 35-40 ft. Receptacle 37-55 X 20-30 M . Primary ap- 

 pendage 50-200 ft, its branches (longest) 350-375 /z. Stalk of peri- 

 thecium (larger) 90-110 x 25-30 p. 



On Lathrobium punctulatum Lee. and L. angulare Lee, Massachu- 

 setts. On L. fulvipenne Grav., Germany. 



The European specimens of this species, though distinctly larger 

 than the American, correspond in all essential characteristics. The 

 receptacle may rarely produce three perithecia, two being not uncom- 

 monly present. 



Rhadinomyces cristatus, nov. sp. 



Perithecia nearly hyaline or slightly yellowish, blunt, tapering 

 slightly, its stalk elongate. Appendage stout and long, its distal cell 

 bearing a crest-like series of three to six or more dark reddish brown 

 rigid, straight, erect, simple, cylindrical branches. One or more 

 similar branches may also arise from the distal end of the middle cell 

 of the receptacle. Spores 50 X 4 /x. Perithecium 110 X 32 /*; its 

 stalk (longest) 280 X 19 p. Receptacle (largest) 165 X 28 p. Main 

 appendage (largest) 185 X 19 p; its branches (longest) 350 p. 



On Lathrobium nitidulum Lee, Kittery, Maine, and Cambridge, 

 Mass. 



CORETHROMYTCES, Thaxter. 



In addition to further material of the type species of this genus, 

 several allied forms have been obtained, two of which are described 

 below. Although Ihese correspond in structure to the type, they fur- 

 nish data which indicate that the limitation of the receptacle to the 

 basal cells (apparently always two) from which the perithecium and 

 the compound appendage were considered to arise directly, cannot be 

 correct, from the fact that a second perithecium is not infrequently 

 developed above the first from the basal cell of the supposed appen- 

 dage. The main, usually black and opaque, portion of this structure 



