234 THAXTEE. 



appendages; while from one or more of the remainder, peritheeia 

 may develop; adventitious peritheeia may also arise from any cell 

 of the primary or from those of the lower secondary appendages. 

 Peritheeia straight, somewhat asymmetrical, the stalk-portion short 

 and not clearly defined, one margin more strongly con^•ex; tapering 

 distally to the short, nearly symmetrical, rather clearly differentiated, 

 small, blunt apex. Peritheeia 80-110 X 20-18 /x. Receptacle and 

 foot 40 /J. or less. Appendages variably elongated up to 425 X 9 /x. 



On the elytra and prothorax of Tencbrio quadrihamatus Faimi. 

 No. 2801B, M. C. Z., Madagascar, (Wulsin). 



This species is remarkable from its habit of producing adventitious 

 peritheeia and antheridia from primary and secondary appendages, 

 as many as thirty-five of the latter being sometimes formed by a 

 single individual, which may take on an irregularly furcate habit 

 owing to the development of a large antheridiiferous branch from the 

 subbasal cell. A majority of individuals, howe^■er, are more nearly 

 of the normal type for the genus, although the primary appendage 

 usually bears antheridia, like the undifferentiated axis below it. 

 Both the primary and secondary appendages of the female are often 

 greatly elongated and adventitious peritheeia may appear even near 

 their extremities. The species is most nearly allied to D. anomalus, 

 but is very clearly distinct. 



Dimeromyces anomalus nov. sp. 



Male individual pale yellowish; the axis rather slender, consisting 

 of an indeterminate number of cells, slightly tapering, without differ- 

 entiation of an appendage; the subbasal cell usually developing a 

 secondary appendage which is similar to the main axis, and gives the 

 individual a furcate habit; any cells of the axis, or the branch, pro- 

 ducing antheridia of which there may be six more or less on the inner 

 upper side. Antheridia rather stout, with short well defined stalk- 

 cells, the necks rather short and stout, well distinguished, somewhat 

 curved. Antheridia 20 X 6 /x, longest axis 66 ^c. 



Female individual pale yellowish, the subbasal cell giving rise to a 

 secondary appendage which forms an axis similar to the main axis, and 

 like it diverges at right angles to that of the basal cell; the two axes 

 hardly distinguishable from one another, producing from the upper 

 side near the base one or several peritheeia and sterile branches: the 

 cells of the axes and branches slightly longer than broad, the latter 



