46 BOTANICAL GAZETTE [JULY 
tion, and there seems to be at present no general term agreed 
upon for the spore producing cell. The study of the exact proc- 
ess of fertilization and its effects in a greater number of species 
is necessary before the question of homologies, and hence of 
terminology, can be definitely settled. 
Besides the greater complexity and the presence of the 
enveloping cells, which render it more difficult to trace the later 
stages of the development of the cystocarp in Griffithsta Borne- 
tiana, the obscurity is increased by the presence in large num- 
bers of dichotomously branched hairs, which sometimes nearly 
cover the cystocarp. Dr. Farlow calls attention to these hairs 
arising from the upper border of the thallus cells. In the pres- 
ent study they were never found elsewhere than at the upper 
portion of a joint, and, with one exception, never on other joints 
than those bearing cystocarps. In that case it seemed possible 
that a cystocarp had been broken off, though that could not be 
demonstrated. Although a cystocarp sometimes occurs without 
these hairs their presence was found to be so nearly constant as 
to suggest a possible connection between the two, either mor- 
phological or physiological. 
CORNELL UNIVERSITY. 
EXPLANATION OF PLATES I AND II: 
All the figures were drawn with the aid of the camera lucida from material 
stained with acid fuchsin and mounted in glycerine. 
j. Joint from which the fertile branch has arisen. 4. Basal cell of fruiting 
branch, c.c. Central cell. #. Peripheral cell. s¢. Sterile cell cut off from 
peripheral cell. s. Peripheral cell functioning as supporting cell of carpe 
genic branch. c.Carpogonium. 7. Tiichogyne. £/. Placental cell. /. Spo- 
rogenous lobe. sf. Spore. 6.72. Basal cell of involucre filament. 2. Ter- 
minal cell of involucre filament. v. Neighboring vegetative cell. 
Fic. 1. One-celled fruiting branch, somewhat separated from main joint, 
but connécted by a stout strand of protoplasm. 
Fic. 2. A two-celled branch. 
F1G. 3. The first peripheral cell has been cut off from the central cell by 
an oblique wall. The vegetative cell has not developed or has been severed. 
Fic. 4. The four-celled branch lies over the vegetative cell. One periph- 
eral cell lies partially beneath, the other above the central cell. 
