NEW LABOULBENIALES. 653 



its distal cells, and sometimes a few near its base, cutting off distally 

 and externally, without definite sequence single small cells which bear 

 antheridia the antheridial cells of which become eventually free, or 

 normal appendages: the median series present only in the primary 

 axis and consisting of smaller more flattened cells, beginning above the 

 lowest pair of the marginal series, and extending to the tip of the 

 perithecium, with the curved inner margin of which a series of about 

 ten of its distal cells is united; these cells, except the lowest which are 

 rounded, are broader than long, the uppermost externally free, tri- 

 angular, its pointed end reaching almost to the apex of the perithe- 

 cium: the posterior series similar to the anterior, three or four of its 

 lower cells cutting off appendiculate cells distally and externally, but 

 without order; the series otherwise without appendages and extending 

 to the penultimate cell of the middle series to which its terminal, 

 triangular, distally pointed cell is united. Appendages of the usual 

 type, evanescent, the primary appendage apparently lateral near the 

 base, and hardly distinguished. Perithecia rich contrasting brown, 

 the outer margin free, nearly straight, or slightly concave; the inner 

 strongly convex; the broad short tip hardly distinguished, slightly 

 bent outward, the apex truncate or flat-papillate, hyaline-edged. 

 Spores 45 X 5 ju. Perithecia 65-75 X 23-27 fx. Total length to tip 

 of perithecium, longer individuals, 500 ii, by 20 ju near base and 28 ^t 

 distally. 



On Lejptaidax dentatiis F. No. 2393, Mindanao, Philippines. 



A peculiar and very distinct species most nearly resembling R. Ber- 

 lesiana; its most striking peculiarity being the remarkable curved, 

 crest-like or fin-like marginal series of cells which are united to the 

 strongly curved posterior margin of the perithecium, this series being 

 double if the perithecium terminates a primary axis, or single if the 

 latter is secondary; the individual cells in the latter case being several 

 times broader than long. Although the general structure is normal 

 and typical, the antheridial cells appear to become separated as in the 

 type formerly distinguished as Distichomyces. 



Nycteromyces nov. gen. 



Male Individual consisting of a single series of superposed cells; 

 a foot and well developed basal cell; an indeterminate number of 

 small cells bearing compound antheridia, and two terminal, super- 

 posed, sterile cells, the upper peculiarly modified. 



