ZOOLOGY AND BOTANY, MICEOSCOPY, ETC. 617 



Biology of Poronia punctata.* — Miss Maria Dawson has followed 

 out the life-history of this ascomycetous genus of Fungi, which she 

 places between Polystigma and Xylaria. The trichogyne-like processes 

 are treated as a degenerate organ, homologous to the trichogynes of the 

 Florideae and of the Collemaceae. Associated with this degenerate 

 process is a coiled hypha comparable to the archicarp of Polystigma. 

 The spermogones and pollinoids (spermatia) are not developed, so that 

 there can be no question of the sexual function of the trichogyne. 



New Genera of Laboulbeniacese.f — Mr. E. Thaxter now adds 68 

 more to the known species of this family of Fungi, parasitic on living 

 insects, together with the following seven new genera : — 



Polyascomyces. Receptacle consisting of two superposed cells, the 

 upper bearing a perithece laterally and an appendage terminally ; 

 appendage consisting of a series of superposed flattened cells, sur- 

 mounted by a dome-shaped portion which is not persistent ; perithece 

 with a distinct stalk-cell and well-developed basal cells, the supporting 

 cell and the lower wall-cells forming a broad base, the upper surface of 

 which constitutes a broad ascigerous area, the asci arising from great 

 numbers of ascigerous cells. 



Monoicomyces. Receptacle consisting of a basal and sub-basal cell, 

 above which it terminates in a small 2-celled sterile portion ; the fertile 

 branches consisting of from one to several cells in different species, 

 the terminal cell of each branch normally giving rise to a stalked 

 perithece and a stalked antherid ; antherid of the compound type, con- 

 sisting of a stalk composed of two cells, the antherid proper consisting 

 of certain basal cells, two tiers of peripheral cells which surround 

 numerous antheridial cells and a cavity above them, and three or four 

 terminal cells, surrounding an opening through which the antherozoids 

 are discharged. 



Limnaiomyces. Receptacle consisting of two portions, a basal part 

 below the perithece and a distal part united to its posterior margin ; 

 the basal portion consisting of a single basal cell surmounted by two 

 tiers of cells, the anterior cell of the upper tier giving rise to a compound 

 antherid ; the distal portion consisting of an inner and an outer elon- 

 gated cell, the inner one terminating in a bell-shaped appendiculate 

 cell, the outer one forming a series of cells from which a small 

 secondary appendiculate cell is separated off. Intermediate between 

 Peyritscliiella and Chitonomyces. 



Eucorethromyces. General form as in Bhadinomyces ; the receptacle 

 consisting of two superposed cells, the upper giving rise to the perithece 

 and appendage ; perithece as in Bhadinomyces, stalked ; appendage con- 

 sisting of several superposed cells, the distal one bearing terminally a 

 series of branches which produce free flask-shaped antherids laterally, 

 borne on short lateral branches or sessile. 



Clematomyces. Receptacle consisting of a basal and a sub-basal 

 cell, from which arises distally a main axis bearing a terminal perithece 

 and formed by a double row of cells ; the cells of the external row 

 producing sterile appendages ; antherids simple. 



* Ann. of Bot., xiv. (1900) pp. 245-62 (2 pis.). 



t Proc. Amer. Acad. Arts and Sci., xxxv. (1900) pp: 409-50. Cf. this Journal 

 ante, p. 366. 



Oct. 17th, 1900 2 T 



