SPESSARD—PROTIIALLIA OF LYCOPODIUM 



73 



cm. above the ground, and another had just emerged from the 

 prothallium. In color it resembled closely the gametophyte of 

 Botrychium virginianum. The specimens of L. clavatiim were 

 much smaller and almost white in color. They varied in size from 

 6.5X5 mm. to 5X3 mm. The largest fragment measured 7X5 

 mm., and the smallest 2X1 mm. Figs. 6, 7, and 8 show the entire 

 specimens. The fragments were more twisted and wrinkled than 



Figs. 16, 17. — Fig. 16, antheridiura of L. clavatiim in sperm mother cell stage, 

 X365; fig. 17, archegonium of L. complanatum immediately before neck canal cells 

 break down, the lowest neck canal cell being double, X365. 



these, but both the fragments and the entire specimens showed a 

 distinct crown on the border, which in one case (fig. 7) was double, 

 the inner crown having an irregular outline. Each of the entire 

 prothallia showed the primary tubercle very distinctly, near the 

 middle, on the ventral side. 



The prothallia of L. complanatum were all entire except one 

 which had the lower portion broken off. Seven of these prothallia, 



