EXTRA-AMERICAN L.\BOULBEMALES. G99 



Dimeromyces pedalis nov. sp. 



Male individiiaL Hyaline, the axis consisting of three cells; the 

 basal much larger, with a well developed black foot; the two others 

 rather narrow, subequal, of nearly uniform width, externally convex: 

 the terminal appendage separated by a slightly blackened septum, 

 its basal cell clearly defined, twice as long as broad; the rest of the 

 appendage slender, slightly tapering, with an indistinct septum. 

 Antheridium erect, the neck and venter rather clearly distinguished 

 and of about equal length, the latter externally convex, and extending 

 to the basal cell, its inner margin in continuous contact with those of 

 the subbasal and terminal cells. Total length to tip of antheridium 

 28 X 8 M- Antheridium IS X 5 /x. Appendage 18 X 3 m- 



Female individual. More or less tinged with brownish yellow, 

 especially the appendages; axis of the receptacle consisting of usually 

 about eight cells, tapering somewhat above and below; the primary 

 appendage erect, terminal, separated by a dark septum; its basal cell 

 somewhat inflated, the distal portion tapering, and with an indistinct 

 septum: secondary appendages usually four, sometimes three, rela- 

 tively short, the perithecia protruding beyond their abruptly curved 

 or recurved tips, the terminal cells inflated and often splitting in two 

 lip-like halves which may become somewhat curled; the axis of five 

 or usually six cells, tapering toward the base. Perithecium single in 

 the types, usually arising from the third cell below the primary ap- 

 pendage, its very short stalk bent abruptly, so that it diverges some- 

 what irregularly sidewise; tapering slightl}^ to a broad blunt apex 

 which may be almost symmetrically three-papillate, the papillae large 

 and broadly rounded, the middle one higher and broader; or more 

 irregular according to the point of view. Spores 18 X 2.5 ^t. Peri- 

 thecia 42-52 X 14 jx. Receptacle 35-40 X 8 ^t. Appendages, primary, 

 30 |U, secondary 40-50 ix. 



On the legs of Oscinosoma inacqualis T. Beck. Xo. 2139, Sarawak, 

 Borneo. 



This species is intermediate between D. Oscinosomalis and D. 

 coardatus. Apart from other differences, it may be separated from 

 the former by its short appendages and normal foot, and from the 

 latter by its shorter perithecia, and less numerous appendages, which 

 lack the peculiar right and left divergence so characteristic in the 

 papuan type. The host has been kindly determined by Dr. Speiser. 



