158 PROCEEDINGS OF THE AMERICAN ACADEMY. 



bearing antheridia and separated by horizontal, or but slightly 

 oblique, septa; the series terminated by a unicellular mitriform 

 appendage, somewhat variably inflated, symmetrical, broader than 

 the axis which it terminates. Antheridia nearly horizontal, straight, 

 two to seven in number, arising on one side in a single series from all 

 the cells of the receptacle except the basal, their stalk-cells relatively 

 long, sometimes exceeding in length the body of the antheridium, 

 which is short and broad, the discharge tube short, straight and stout. 

 Total length (including foot, 16 /jl) about 50-60X9 /jl. Appendage- 

 cell 14-20X 10-12 M. Antheridia about 35 m, the stalk-cell 9-18X6 /x, 

 the venter 10X12 /x. 



Female individual, pale straw-yellow. Receptacle similar to that 

 of the male, consisting of four or five superposed cells terminated by 

 a mitriform sterile appendage-cell, the cell immediately below it 

 usually giving rise laterally to an erect, or slightly divergent, appen- 

 dage of usuall}^ five or six successively smaller somewhat inflated 

 cells; the first perithecium usually arising from the cell next below, 

 one or two more perithecia rarely developed from the cells immediately 

 below the first. Perithecium usually solitary, relatively large, its 

 axis nearly at right angles to that of the receptacle or curved upward 

 from it; usually slightly broader distally, the tip not clearly dis- 

 tinguished, the apex blunt, slightly sulcate. Spores (in perithecium) 

 60X9 IX. Perithecium 150-215X30-40 tx, the sporogenous portion 

 100-135 /x. Appendage 60-100X8 /x. Receptacle to tip of primary 

 appendage-cell, including foot, 80-100 /x. 



On the elj^tra of Coryniies ruficollis Fabr., La Plata, No. 1459. 



A clearly distinguished species, most readily recognized by its 

 mitriform sterile appendage-cell. Both sexes appear to grow ap- 

 pressed on the elytra, the antheridia and perithecia projecting upward 

 nearly at right angles. 



Dimorphomyces Meronevae, nov. sp. 



Male individual, relatively large, nearly hyaline, or with faint 

 reddish brown suffusions at the base of the appendage. Basal cell of 

 the receptacle rather large, subtriangular, distally in contact with the 

 outer half of the wedge-like base of the long antheridial stalk-cell; 

 somewhat obliquely separated from the squarish subbasal cell; the 

 appendage relatively short, not extending beyond the base of the neck 

 of the antheridium, its basal cell rounded, somewhat longer than 

 broad, sometimes nearly as large as the whole receptacle and dis- 



