NEW INDO-MALAYAN LABOULBENIALES. 17 



may show more variability than is indicated by the diagnosis when 

 abundant material is available. It is most readily distinguished by 

 the abruptly differentiated compressed tip of the perithecium. It 

 differs from R. Lcptochiri in having a triseriate receptacle. 



Rickia Uropodae nov. .sp. 



Form rather stout, habit more or less crest-like, axis indeterminate. 

 Basal cell abruptly distinguished, more than twice as long as broad, 

 slightly curved, with thick brownish yellow walls, and followed by 

 two small paired cells symmetrically placed; above which the cells of 

 the axis are triseriate, hyaline: the axial row united to the perithecium 

 laterally nearly to the apex, three or four of its distal cells extending 

 free beyond the insertion of the primary appendage, some of them 

 bearing secondary appendages, its cells below the base of the peri- 

 thecium small and squarish: of the two lateral axis-rows one, the 

 anterior, is more nearly straight or not strongly curved, usually 

 consisting of from eight to twelve cells, terminating at the base of the 

 perithecium; one to four of its slightly prominent and radially elon- 

 gated cells bearing at irregular intervals single, relatively large, com- 

 pound antheridia which are subtended by single small triangular cells: 

 the posterior lateral series, which is strongly curved, consists of from 

 twenty-five to thirty or more cells which are somewhat more elongated 

 radially (broader), and all of which without exception give rise to large 

 pear-shaped bladder-like appendages, hyaline, becoming brown, short, 

 slightly curved outward, subtended by a single small cell to which 

 they are attached by a narrow stalk, and distinguished by a dark 

 septum; the series ending in the large highly differentiated primary 

 appendage, the terminal (appendage-) cell of which is evanescent; 

 the two-celled sessile base large, cylindrical or slightly narrower dis- 

 tally in the region of its upper and much smaller cell; the whole 

 brownish yellow, free, projecting outward at a small angle from the 

 axis below it, its origin about three quarters of the distance from the 

 base to the apex of the perithecium. Perithecium dark rich brown, 

 wholly free externally, turned to an almost horizontal position by the 

 curvature of the axis; the tip broad, not very clearly distinguished, 

 about half free on the inner side, the apex blunt, broad, somewhat 

 asymmetrical. Perithecium, exclusive of marginal cells, 60 X 18 ju. 

 Basal part of primary appendage 16 X 8 ju. Secondary appendages 

 18 X 9 M- Total length 100-120 X 30 ju. 



