Figs. 9-15. — Fig. 9, prothallium bearing a sporeling of L. lucidulum, the only 

 specimen found, showing 4 paraphyses, archegonia, primary tubercle, rhizoids, and 

 an enlargement made by foot of sporeling, X6; fig. 10, prothallium of L. annotinum 

 bearing 3 sporelings, smallest one just emerging from upper tip of lower lobe of game- 

 tophyte, natural size; fig. n, detailed drawing of largest sporeling shown in fig. 10, 

 X3; fig. 12, old sporeling of L. clavatum with foot still present, having lost erect habit 

 of younger sporelings and assumed trailing habit of adult, X2; fig. 13, sporeling and 

 portion of gametophyte of L. obsciirum, rest of gametophyte being like corresponding 

 portions of fig. 5, X4- 25; fig. 14, diagram showing leaf contour of sporelings of L. lu- 

 cidulum (7), L. annotinum (a), L. clavatum (c), and L. obscurum (0); fig. 15, diagram 

 showing general profile of leaves of sporelings, the leaf being directed upward in 

 /.. lucidulum (7), drooping in 1.. annotinum (a), directed upward but bearing bristle in 

 /.. clavatum (<;), bending downward then upward in /,. obscurum (0), leaving the 

 stem almost at a right angle. 



