56 PROCEEDINGS OF THE AMERICAN ACADEMY. 



COREOMYCES nov. gen. 



Mature individual consisting of a single series of superposed cells 

 terminated by a single perithecium. Receptacle attached by a more 

 or less rhizoid-like foot and consisting of three superposed cells, the 

 upper of which becomes divided distally by successive transverse septa ; 

 these divisions resulting in a series of superposed cells, from each of 

 which arises, on one side, a single branched appendage ; the members 

 of the series thus resulting being superposed in a single vertical row. 

 Perithecium consisting of an undifferentiated stalk-cell immediately 

 above the appendiculate cells, which is followed directly by the asciger- 

 ous cavity, the septa which separate the basal and wall-cells being 

 obliterated in mature individuals. 



The antheridia of this anomalous genus have not been definitely dis- 

 tinguished, but appear to be similar to those of Ceratomyces, to which 

 it otherwise does not appear to be nearly related. The development of 

 the perithecium, in so far as it is shown by the material available, seems 

 distinctly unlike that of any other genus. 



Coreomyces Corisae nov. sp. 



Curved or straight, pale dull brownish, nearly transparent. Cells of 

 the receptacle distinguished by more or less distinct constrictions, the 

 three lower somewhat variable in length, the basal smaller, usually 

 tapering somewhat to the foot ; the subbasal larger than either of the 

 others, more or less inflated, often as broad as the perithecium ; the 

 upper cell somewhat narrower, followed by the two to four, usually 

 flattened, appendiculate cells, which are successively longer, though 

 usually slightly narrow from below upward, the uppermost becoming 

 about half as long as broad. The appendages long slender hyaline, 

 sparingly branched, slightly divergent; usually extending upward to, or 

 considerably beyond, the tip of the perithecium. Stalk-cell of the peri- 

 thecium not differentiated from the cells below it, large, as broad as the 

 body of the perithecium above it, cylindrical or slightly inflated, about 

 as long as broad or slightly longer : body of the perithecium usually 

 straight, somewhat darker dull brown especially where it tapers rather 

 gradually to the small tip which becomes distinctly symmetrically four- 

 papillate, and is usually more or less conspicuously bent to one side. 

 Spores 85 X 6 jx. Perithecia 100-110 x 25-35 /x, the stalk-cell 

 30-33 X 32-35 ti. Receptacle, exclusive of the appendiculate cells, 



