THAXTER. — LABOULBENIACE^E. 95 



cium consisting of four series of about twelve cells each, its base 

 formed from three small cells, below which a single similar small 

 cell connects it with the receptacle. Receptacle consisting of three 

 small superposed squarish cells, the upper of which gives rise to the 

 perithecium and the appendage. The appendage, consisting of six or 

 more superposed flattened cells becoming externally suffused with 

 blackish brown or black (the suffusion sometimes involving the whole 

 series as well as the entire receptacle with the exception of its basal 

 cell), bearing on its inner side numerous hyaline branches which may 

 in turn be once or twice branched, the lower arising from a series of 

 small cells which may extend across the base of the perithecium on 

 one side. Spores 15 X 2.5-3 p. Perithecium 75-90 X 22-29 p. 

 Receptacle 25 fx long. Total length to tip of perithecium 100-140 n, 

 to tip of main appendage 45-65 p. Longest branches of appendage 

 75 ft. 



On Lathrobium punctulatum Lee. Kittery Point, Maine. 



This minute and curious species is chiefly interesting from the fact 

 that it is a terrestrial form in a typically aquatic genus, of which, how- 

 ever, it seems to possess all the essential characters. Unlike most, of 

 its congeners, it is among the smallest of all the Laboulbeniacea?, 

 and is very readily overlooked. 



SPHALEROMYCES, nov. gen. 



Receptacle consisting of two superposed cells, the distal bearing the 

 appendage laterally, and the stalk cell of the perithecium terminally. 

 Perithecium asymmetrical, the apex somewhat pointed ; separated from 

 its short stalk cell by three basal cells. Appendage clearly distin- 

 guished from the receptacle, composed of a basal cell bearing a series 

 of superposed cells, each giving rise from its inner upper angle to a 

 single short septate branch which may bear flask-shaped antheridia. 

 Spores once septate involved in mucus. Asci arising in a double row 

 from a single large ascogenic cell. 



Sphaleromyces Lathrobii, nov. sp. 



Wholly hyaline or faintly yellowish. Perithecium rather slender, 

 slightly inflated towards the base, tapering to the somewhat pointed 

 apex which is bent inwards ; the dividing lines between the wall cells 

 indicated by successive ridges, the distal more prominent : the short 

 stalk cell, separated from the perithecium by three additional cells. 

 Receptacle consisting of two obliquely superposed cells, the upper 



