THAXTER. — NEW LABOULBENIACEAE. 305 



unilateral series, a pair of simple cylindrical few-celled appendages, which 

 hecorae better developed from below upward ; arising side by side, closely 

 associated and appressed, characteristically blackened at the base, which 

 is usually indistinguishable from the small blackened cell from which 

 they arise, and which is obliquely separated just below each septum of the 

 axis : tliis opaque region in the lower cells of the axis usually projecting 

 characteristically like a notch or tooth : the cells of the axis near its base 

 deeply suffused or opaque ; the suffusion becoming, from below upward, 

 gradually associated with the septum only : the axis in some specimens 

 nearly hyaline throughout, with blackish-brown suffusions at or about the 

 septa. The paired appendages replaced somewhat irregularly below the 

 perithecium by antheridia of small size, resembling the appendages in 

 general appearance when viewed laterally, and usually terminated by two 

 hyaline simple appendages of no great length. Perithecium solitary, 

 terminating the main axis, or its secondary axes; faintly yellowish, 

 straight, nearly symmetrical, rather abruptly narrower at the tip, the 

 apex rather small, symmetrical, truncate. Total length to tip of peri- 

 thecium 250-800 £<, the axis about 18-20^/ in diameter. Perithecium 

 70-90 X 18-25 jm. Longer appendages sometimes 50 ft. 

 On all parts of several species of Leptochirus, Java. 



Monoicomyces similis nov. sp. 



Pale straw-colored. Receptacle consisting of two superposed cells, 

 terminated by a straight tapering simple several-celled appendage, some- 

 times reaching to the tips of the perithecia, and distinguished by a black 

 basal septum. The subbasal cell of the receptacle also giving rise to a 

 pair of normally symmetrical branches, consisting of a single basal cell, 

 from which arises the stalk-cell of the perithecium on the inner, and that 

 of the antheridium on the outer side. Stalk-cell of the perithecium 

 narrowed at the base, the narrow portion red-brown, expanding above 

 and hyaline. Perithecium somewhat asymmetrical or bent, deeper straw- 

 colored, tapering gradually to the blunt tip, which is hardly distinguished. 

 Antheridium of the normal type, the distal appendages usually two, one 

 sometimes exceeding the tip of the perithecium. Total length to tip of 

 perithecium 150-200 u. Perithecium 90-110 X 30^, the stalk-cell 

 35 X 46 ;u. Spores about 35 x 4 /j. 



On the abdomen of Homalota sp., infesting species of Lactarius, 

 Kittery Point, Maine. 



vol. xli. — 20 



