THAXTER. — NEW LABOULBENIACEAE. 66 



tip broad with a bluntly rounded apex ; a short erect contrasting brown 

 prominence formed by the left posterior lip-cell, toward the base of which 

 the inner (anterior) lip-cells are curved in a characteristic fashion, so as 

 partly to overlap it. Spores about 75 X 5 /a. Perithecium 125 X 36 /x. 

 Receptacle 250-270 /x,. Total length to tip of perithecium 255 fi. 



On the superior surface of the tip of the abdomen of Orectogyrus 

 specularis Aube. Africa. Berlin Museum, No. 806. 



DIOICOMYCES nov. gen. 



Male individual consisting of four superposed cells, the upper of 

 which is a simple antheridium bearing a subterminal discharge tube. 



Female individual. Receptacle ending distally in a peculiarly modi- 

 fied sterile cell, corresponding to the upper spore-segment : the subbasal 

 cell producing a single perithecium laterally, and separated from the 

 sterile terminal cell by a second small cell. Perithecium free, stalked ; 

 the ascogenic cell single, the spores more or less obliquely once-septate, 

 and of two kinds corresponding to the sexes. 



Dloicomyces Floridanns, formerly referred provisionally to Amor- 

 phomyces, must be transferred to this genus ; since, although the male 

 is unknown, the female has the typical characters which distinguish the 

 genus very clearly from its near ally. D. obliqueseptatus on Myrmedonia 

 (?) sp. must also be removed from Atnorphomyces, on account of its 

 obliquely septate spores, and should with little doubt be included in the 

 present genus ; although it is evident, from comparison with abundant 

 material of the species described below, that the specimens, both females, 

 from which the original description was made, are more imperfect than 

 was at first supposed, and should not have been used as types. The 

 peculiar sterile cell is present in neither of these ; but, since they corres- 

 pond in all other respects to the generic type, may be assumed to have 

 been broken off. No free spores are available in either, although an ex- 

 amination of the spore mass within the ascus seems to show that they 

 present the same variation in size which characterizes the species described 

 below. 



Dioicomyces Anthici nov. sp. 



Male individual. Form slender, of nearly the same diameter through- 

 out, the basal cell half the total length of the individual to the tip of the 

 discharge tube ; the third cell nearly square, the subbasal about as large 

 as the terminal antheridial cell, which ends in a distal blunt projection ; 

 the discharge-tube arising laterally below the tip, projecting upward from 



VOL. XXXVII. — 3 



