THAXTEK. — LABOULBENIACEiE. 99 



brownish or nearly hyaline, consisting of three superposed cells, the 

 basal small and narrow, the sub-basal squarish, the distal large, 

 rounded and followed by the circular series of small cells from which 

 arise the numerous appendages which in general resemble those of 

 T. mirificus though 2 jro P 0, 'tionately stouter and more intricately 

 branched. Spores 26 X 3.7 p. Perithecia 120-137 X 37 p. Stalk 

 cells 75-100 p. Longest appendages 150 p. Three basal cells of 

 receptacle 37 X 22 p. 



On Actobius nanus Horn. Kittery Point, Maine. 



This species occurred with the next on the legs of its host. It differs 

 from T. mirificus in the form of its perithecia, which are subconical, 

 as well as by its hyaline or nearly hyaline symmetrical receptacle. 

 The short stalk cell and large basal cells of its perithecia serve also 

 to distinguish it. 



a 



Teratomyces brevicaulis, nov. sp. 



Perithecia several, purplish brown, long, slender, straight or 

 slightly curved, cylindrical or slightly inflated near the middle, taper- 

 ing abruptly to the almost truncate apex, much longer than the stalk 

 and basal cells together, the latter concolorous with the perithecium, 

 the stalk cell nearly hyaline. Receptacle nearly symmetrical, black 

 and quite opaque, except the partly translucent basal cell ; above the 

 opaque portion expanding abruptly to form the broad distal portion 

 from the numerous small cells of which arise, around the edge, the 

 circle of crowded appendages which surround the perithecia. Larger 

 appendages faintly tinged with brownish purple, consisting of a rather 

 short basal cell bearing a short series of superposed external branches, 

 the uppermost consisting of a large, long basal cell curved and some- 

 what inflated distally, where it bears externally a series of two to five 

 secondary branches similarly shaped which may in turn be similarly 

 branched, the ultimate branchlets bluntly pointed with numerous slightly 

 oblique septa or terminating in long beak-like cells (autheridia). 

 Spores 33 x 4 M . Perithecia 110-120 x 23 p. Stalk cells 50 X 15 p. 

 Receptacle 85 X 50 p. Longest appendages 100 p. 



On Actobius nanus Horn. Kittery Point, Maine. 



This curious species is quite distinct from that with which it was 

 associated on the same host, and differs in the form of its perithecia 

 and appendages as well as the peculiar and abrupt distal expansion of 

 its receptacle. Both of the types, which occurred at the tip of the 

 abdomen of the host, have three perithecia. 



