40 THAXTER. 



than the anthcricha, cyUndrical or somewhat swollen, hyaline, be- 

 coming faintly yellowish. Perithecia almost symmetrically subfusi- 

 form, subtended by a well defined irregularly triangular stalk-cell, the 

 tip wholly free or its base partly enclosed on one side, conical, its 

 margins evenly continuous with those of the distal cells of the anterior 

 and median series; the apex rather broad, round or truncate, some- 

 times with minute erect lateral projection. Spores about 42 X 4 ;u. 

 Perithecia 100-130 X 30-40 m- Antheridia 15 X 4 m- Appendages 

 15-22 X 5-6 M- Total length to tip of perithecium 200-275 X BO- 

 SS M- 



On Amblyscelis sp., Nos. 2565 and 2571, Kamerun. 



A rather large pale species, somewhat similar to R. Pajnuma and 

 R. circumdata in general appearance, but distinguished by numerous 

 points of difference; for example in the production of appendiculate 

 cells from the distal cells of the median series. In a number of speci- 

 mens certain appendiculate cells, irregularly scattered, may become 

 blackened abnormally, and other cells may occasionally be similarly 

 modified. 



Rickia Ancylopi nov. sp. 



Nearly symmetrical, wholly suffused with dirty brown, except the 

 hyaline contrasting appendiculate cells; darker or opaque in the 

 region of the perithecium. Receptacle triseriate, the foot large broad 

 and rounded, the basal cell evenly suffused with pale dirty brown, its 

 pointed distal third or more intruded between the basal cells of the two 

 marginal series: anterior series extending slightly further than the 

 median series, consisting of usually fifteen obliquely superposed cells 

 which are subecjual and more or less deeply suffused, except the three 

 uppermost; the latter nearly hyaline and small; all except one or two 

 of the uppermost cutting off externally and distally one or two quite 

 hyaline cells, which bear normal antheridia or appendages: posterior 

 series similar to the anterior, its basal cell somewhat larger, and 

 usually cutting off a single appendiculate cell; the three terminal cells 

 smaller and hyaline; the two upper usually not associated with 

 appendages; the well developed and wholly free base of the primary 

 appendage, the two cells of which are subequal and separated by a 

 slightly oblique septum, projecting outward above the terminal cell: 

 median series consisting of usually fourteen cells, the five or six lying 

 below the base of the perithecimn subequal and each of about the 

 same diameter throughout its length, except the uppermost, which 



