vic) : BOTANICAL GAZETTE [JANUARY 
The reader must judge for himself whether it is at all likely that two 
species in the same genus should differ from one another so fundament- 
ally as would appear from Professor FARMER’s description of sporogenesis 
in Pallavicinia decipiens and my own account of P. Lyellii. 
Respecting the fixation of my material, I may say that I have no reason 
to think the penetration was not sufficiently rapid to fix the cell contents. 
Even with imperfectly fixed material my main conclusion is easily demon- 
strable, viz., that in P. Lyellii there are two successive mitoses in the 
spore mother-cell. Let us not lose sight of the main point at issue— 
ANDREW C. Moore, South Carolina College, Columbia. 
