52 



THAXTER. 



all, with a few irregularly distributed exceptions, cutting oflF distally 

 and externally single cells which may be even larger in size, and bear 

 either antheridia or appendages; the terminal cell broad, flattened, 

 often suffused, and forming a straight, very oblique, clearly defined 

 base to the perithecium: posterior series consisting of from about 

 sixteen to twenty cells; similar to the anterior, and terminating in the 

 basal cell of the base of the primary appendage, which lies about 

 opposite the middle of the perithecium; the cells of both marginal 

 series often tending to become vertically divided: median series con- 

 sisting of about fourteen to eighteen cells which become deeply suf- 

 fused with blackish brown, the suffusion becoming opaque, involving 

 to some extent the adjacent cells and continuous with that of the 

 perithecium; the cells rather regular and longer than broad, except 

 the six or seven distal ones which lie beside the perithecium, extending 

 to the base of its tip; about three of the terminal cells externally free 

 beyond the base of the primary appendage; the free upper subconical 

 cell of which is larger than the basal cell and diverges laterally. Ap- 

 pendages thick-walled, inflated, straight and stout, somewhat irregular. 

 The antheridia numerous, sometimes more so than the appendages. 

 Perithecia more or less opaque, asymmetrical, short and stout; the 

 base straight and oblique; the tip well distinguished, hyaline or paler, 

 bent abruptly sidewise so that it is partly concealed in side view, 

 tapering to the broadly rounded undifferentiated apex. Perithecia 

 55 X 24-27 /x. Free portion of antheridia 15-20 /x. Appendages 

 mostly 7-10 X 5.5 ijl. Total length to tip of perithecium 125-156 X 

 40-45 fx. 



On legs of Lycopodina sp.; M. C. Z., No. 2801, Madagascar (Wul- 

 sin). 



A striking species, remarkable for the fact that its numerous an- 

 theridia belong to the type present in R. mhnda and several other spe- 

 cies, being partly immersed and without the usual characteristic black- 

 ened insertion. The general habit, however, is rather that of the more 

 typical forms of the genus, although it is somewhat anomalous in its 

 tendency to show abnormal vertical divisions in its marginal cells, 

 which may be smaller than the appendiculate cells separated from 

 them above. 



Rickia Zirophori nov. sp. 



Receptacle triseriate, of about the same diameter from the base of 

 the perithecium to that of the median cell; uniformly hyaline to pale 



