38 THAXTER. 



longer than the numerous hyaline antheridia. The latter tapering, 

 without al)ruptly defined necks. Spores about 28 X 3 /i. Perithecia 

 54-64 X 20 //. Appendages 12 X 3 ix. Antheridia 10 X 3.5 /x. 

 Total length to tip of perithecium 130-175 X 50-55 (jl. 



On Episcaphida piciventris Gorh. No. 2566, and Episcaphula spp. 

 Nos. 2334, 2563 and 2566, Kamerun. 



A species which in general form recalls R. inclnsa, its perithecium 

 being similarly surrounded by the receptacle. It varies from quite 

 hyaline individuals to others which are more or less completely suf- 

 fused and quite opaque below; the distal margin being, however, 

 always hyaline. In one specimen examined the median series has 

 failed to develop, producing an otherwise normal biseriate individual. 



Rickia Papuana nov. sp. 



Broadly spathulate, nearly symmetrical, tapering to a slender basal 

 cell. Receptacle triseriate, hyaline: anterior series extending to the 

 tip of the perithecium; consisting of twenty-five cells, more or less, 

 all except the lowest much flattened; those beside the perithecium 

 radiately arranged, and becoming gradually smaller distally; the low- 

 est one or two cells cutting off one or two, the rest five or six small 

 cells, which lie side by side horizontally, producing very numerous 

 antheridia and scanty appendages: posterior row similar to the an- 

 terior and subsymmetrical with it; its basal cell much larger, consisting 

 of about the same number of cells, ending in the base of the primary 

 appendage, the two cells of which are separated by a very oblique 

 septum, the lower thus greatly overlapping the upper on its inner side; 

 its base broad, convex and included: median series consisting of about 

 eleven cells, the lowest and those beside the perithecium smaller. 

 Antheridia very numerous, hyaline, appressed; the necks well dis- 

 tinguished, purplish, the hyaline tips curved outward. Appendages 

 hyaline, subcylindrical, appressed. Perithecium completely sur- 

 rounded by the receptacle, a portion, only, of the tip free, sub fusiform 

 and subsymmetrical, the tip distally compressed and subcylindrical, 

 partly free; the apex bluntly rounded. Perithecia about 75 X 24 ^(. 

 Antheridia 12 X 4 /x. Appendages 20 X 4 /x. Total length to tip of 

 perithecium 235 X 90 n. 



On Catops sp., British New Guinea, No. 1840. 



The hosts on which this peculiar form occurred were obtained for 

 me in New Guinea by Mr. Muir to whose kindness I am much in- 



