125 
of St. Thomas they were much longer, ovai - pyriform to davate 
until 120 (A. long without thè basai celi and 3o ji. broad and thè 
paraphyses up to 170 [a. long (fig. 2 b). 
Fig. 2 . Ralfsia expansa J. Ag. a and b unilocular sporangia, c plurilocular 
sporangia. (about 300 : 1). 
The paraphyses consisting of from 8-14 cells are thinnest 
(about 3 [A.) and thè cells of which they are composed longest some- 
what below their middle, thè cells growing thicker and shorter 
towards their base and especially towards their top, thè paraphyses 
assuming herewith a davate appearance. 
The plurilocular sporangia (fig. 2 c) are formed by thè para- 
physes, thè cells in their uppermost part being divided by vertical 
and horizontal walls into smaller, more or less cubical cells. The 
sporangia are about 5 - ó (a. thick. 
So far as I can see, this form seems to be very nearly related 
to Ralfsia verrucosa and especially it comes near to that large form 
collected by Schousboe in Maroc and described in some detail by 
8 
