76 BOTANICAL GAZETTE [January 



To establish definitely whether the forms that I have collected 

 are genuine prothallia of Lycopodium, therefore, I have drawn figs. 

 16, 17, 20, and 21 to show an antheridium, an archegonium in 

 which the lowest of the neck canal cells is double, and 2 detailed 

 sketches of the fungus-infected region. The diagrams in figs. 18 

 and 19 indicate the tissue regions shown by sections of 12 prothallia. 



This article seeks to establish the fact that the prothallia of 

 Lycopodium have been found in America; to make known to those 

 botanists who may later desire to find prothallia for themselves, 

 what the conditions were under which the specimens collected 

 were found; and to announce the discover}' of 2 new species of 

 Lycopodium prothallia, namely, L. obscurum and L. lucidulum. 

 Concerning the development and structure of the American 

 Lycopodium gametophytes, the writer hopes to deal in a later paper. 



Marquette, Mich. 



