376 BOTANICAL GAZETTE | NOVEMBER 
events the uniformity of the position of the carpogenous cell 
adds another difficulty to be explained by a theory of sexuality, 
while it is but reasonable to suppose that when a plant adoptsa 
method of apogamous development of its fruit certain cells, 
because of position or age affording perhaps greater nourish- 
ment, would be best fitted to undertake reproductive functions. 
4. The absence of facts pointing to a fertilization of the 
carpogenous cell through the trichophoric apparatus, and the 
difficulty of understanding such a process, while affording 4 
simply negative evidence on the subject, nevertheless deserves 
attention, and appears to the writer as a point in favor of the 
hypothesis of apogamy. 
THE UNIVERSITY OF CHICAGO. 
LITERATURE CITED. 
Bornev and Tuuret (67): Recherches sur la fecundation des Floridées. Ann. 
Sci. Nat. Bot. V. 7:—. 1867 : 
Borner and THURET (76): Notes Algologiques. 1876-80. 
CRAMER (63): Physiologisch-systematische Untersuchungen ber die Ceramia- 
ceen. 1863 
JANCZEWSKI (77): Notes sur le slenelons cas: du cystocarp dans les Fl 
Mem. Soc. Sci. Nat. Cherbourg 20 1877. 
NAEGELI (47): Die neuern ils niohisiek Begriindung eines eigenen Syst 
1847. 
oridées. 
ems der 
Algen und Florideen 
Sitz. Kon. 
Akad. aa Berlin. 
SMITH (96): The development of the cystocarp of Griffithsia Bornetiana. Bot. 
GAZ. 22:35. 1896. 
THUuRET (78): Etudes phycologiques. 1878. 
SCHMITZ (83): i ence iiber die Befruchtung der Florideen. 
3. 
EXPLANATION OF PLATES XVIII AND XIX. 
All figures sketched with the Abbé camera: fig. 7, X 300; ie - 
31 X 800; figs. ¢-15, X 1100; figs. 16-22, X 800 ; figs. 23-25» % 1100 
Piilota serrata Kiitz. - 
Fic. 1. End of a pinna; x, apical cell; 1-vu, nodes; early stages 
procarpic binbchies shaded, 
Fig. 2. An adult procarpic branch from the weléth node; 
eosin, 
stained with 
