NEW DIMORPHOMYCETEAE. 277 



a subtending rounded prominence: the subbasal cell large, obliquely 

 separated. The basal cell of the appendage giving rise to a terminal 

 and sometimes also to one or two subterminal external branchlets, 

 their basal cells distinguished by dark septa, their subbasal (terminal) 

 cells hardly exceeding the tip of the stout antheridium, which is ab- 

 ruptly curved outward. Total length to tip of antheridium, including 

 foot, 35-38 II. Antheridium 15-17 X 7 ijl. 



Female individual somewhat blackened above the foot, the suffusion 

 involving part of cell one and three. At first somewhat spathulate, 

 becoming prostrate; compact, the subbasal cell small and misplaced 

 by the third cell, which bears the single perithecium and appears to be 

 subbasal in position: somewhat obliquely separated from the fourth 

 cell which is distally abruptly prominent below the basal cell of the 

 primary appendage; which, in addition to the terminal branch, may 

 bear two or even three accessory branchlets externally, three-celled, 

 the two lower distinguished by dark septa; the fourth cell also pro- 

 ducing distally and inwardly a second secondary appendage, the 

 basal cell of which may bear from one to three branchlets, similar to 

 those of the primary. The first secondary appendage arising from 

 an undifferentiated basal cell, externally prominent, like the subbasal 

 cell of the receptacle which lies below it; bearing a single three- 

 celled termination, the two lower cells distinguished by dark septa. 

 The receptacle, and the appendages with their branches, lying at 

 maturity in the same plane and seen edgewise; the perithecium usu- 

 ally relatively stout, the neck about as long as the l)ody and often 

 not very clearly distinguished from it; the tip slightly and abruptly 

 bent inward, snout-like, inconspicuously sulcate, broad; the whole 

 projecting upward from the prostrate receptacle at an angle of usually 

 45°. Spores about 20 X 3 m- Perithecium including stalk, 75-130 X 

 13-15 M- Appendages, including basal cell, 20-30^1. Receptacle, 

 seen flatwise, including foot, 28 X 20 ix. 



On the inferior surface of the abdomen and forceps of Chaetospania 

 ihoracica Dohrn., No. 2126, Sarawak, Borneo. 



Although closely allied to D. apprcssus and having much the same 

 habit of growth, this species is clearly distinguished by its appendage, 

 as well as b}' other points. The stalk of the perithecium, in some 

 instances, may be more slender and clearly distinguished from the 

 shorter body, as in D. apprcssus, though never to such a degree. 

 The actual structure of the receptacle and the origin of perithecium 

 and appendages can only be made out in young individuals. 



