278 THAXTER. 



Dimeromyces moniliformis nov. sp. 



Male indivichiaJ. Axis prostrate, consisting of three cells, con- 

 tinuous, with the short straight four-celled terminal appendage, the 

 subbasal cell of which is slightly inflated and distinguished below ))y a 

 slight constriction and black septum. Axis of the antheridium 

 parallel to that of the receptacle, its stalk-cell externally convex, 

 bulging strongly and extending down so as to overlap the distal end 

 of the basal cell; its venter rather stout, slightly inflated, the neck 

 rather short and stout, cur\ed outward distally. Antheridium and 

 stalk 30 X 6 /x. Appendage and receptacle, including foot, 50 fx. 



Female individual nearly hyaline, with faint tinges of purplish 

 brown. Receptacle prostrate, the axis consisting of four subtriangu- 

 lar cells, the second and third wedge-shaped. The primary appendage 

 similar to that of the male, four-celled, the subl)asal cell more promi- 

 nently distinguished by a constriction and black septum; its upper 

 septimi also slightly blackened. Subbasal cell of the receptacle 

 bearing the single secondary appendage, its basal cell overlapping 

 that of the receptacle, strongly prominent and rounded externally; 

 its distal end abruptly narrower, and turned upward to join the 

 nearly hyaline subbasal, which is distinguished from it by a blackened 

 oblique septum: the three succeeding cells slightly suffused, rounded, 

 with strong intervening constrictions, and very broad black septa, 

 the two lower distally oblique; the fourth somewhat larger, wholly 

 and more deeply suffused with purplish brown, the blackened septa 

 narrower; the fifth still larger; the rest of the appendage two- to 

 three-celled, without prominent constrictions, distally tapering 

 slightly to a blunt termination; the whole curved outward and 

 diverging more or less from the perithecium. Perithecium slightly 

 curA'ed inward, normally single, and arising from the third cell of the 

 receptacle; the stalk hyaline, not well distinguished, about as long 

 as the main body which is pale brownish, modified by four successive 

 nearly equidistant and symmetrical enlargements, the upper, which 

 involves the base of the tip, less prominent. Spores about 30 X 4 /x. 

 Perithecia, including stalk, 125-145 X 12-20 /jl. Primary appendage 

 25-34 n: secondary 100-110 X 8 m, at base, X 12 m distally. Total 

 length to tip of primary appendage 58-()0 fx, including foot. 



On forceps of Labia miicrouafa Stab, No. 2139 A, Sarawak, Borneo. 



This species is very clearly distinguished by the moniliform base 

 of its secondary appendage and tlie successi\ e enlargements of the 



