198 



towards the bottom, with most of the branches in this 

 part slightly attenuating and the ends rounded or obtuse, 

 however, towards the sides partly with obtuse and 

 partly even truncate ends. In the part that has turned 

 upwards, and not visible in the figure, the branches are 

 coarser, denser and fully according with those of the 

 specimen represented on pl. 11. 

 Fig. 2. A nearly whorl-shaped specimen about 23 cm. in diameter, 

 showing the part that has turned upwards, with the 

 apex of the branches frequently obtuse, here and there 

 bearing wart-like processes. 



Pl. 13. 



L. dehiscens f. grandifrons. 

 Fig. 1. The upwards turned part of a fragmentary specimen. In 

 the downwards turned part it is partly rubbed partly 

 with new branches in development, and the edges of 

 the frond are bent a little inwards. 



„ 2. Fragment of another specimen. 



,, 3. A specimen showing the part that has turned towards the 

 bottom, with the small bundles of branches often rather 

 depressed, or confluent, forming small expansions, from 

 which small and wart-like processes are developed. It 

 is rather rubbed and denudated in the part that has 

 turned upwards, with somewhat coarser branches. 



PL 14. 



• L. delapsum f. abbreviata. 

 Fig. 1. Habit-figure of the upwards turned part of a cup-shaped 

 specimen; in the lower part with the edges of the frond 

 bent inwards and together with new developed branches 

 somewhat replenished the concavity. 

 „ 2. A younger specimen nearly encompassing a stone. 

 „ 3. A specimen in the act of loosening itself from the enclosed 

 object, a stone. A part of the peripherical portion of 

 the frond is removed. 



