CYTOLOGY OF CUTLERIA AND AGLAOZONITA 
A PRELIMINARY PAPER 
CONTRIBUTIONS FROM. THE HULL BOTANICAL LABORATORY 129 
SHIGEO YAMANOUCHI 
This preliminary note gives a brief account of my cytological 
studies of Cutleria multifida Grev. and Aglaozonia reptans Kiitz. 
The material was collected last winter and spring at Naples, where I 
occupied a table of the Carnegie Institution at the Zoological Station. 
The work was begun at Naples and was continued at the University 
of Chicago under the direction of Professor Joun M. CouLTer and 
Professor CHARLES J. CHAMBERLAIN, to whom I wish to acknowledge 
my great indebtedness for their suggestions and criticisms. Many 
points of cytological interest and importance, as well as the discussion 
of literature, will be presented in the full account to be published 
later. 
Cutleria multifida 
GAMETOGENESIS 
Cutleria multifida is generally dioecious. The young thallus, 
1~3™™ long and narrowly fan-shaped, presents no features to dis- 
tinguish between the male and female plants. When the thallus has 
reached the stage for the formation of reproductive organs, the habit 
of the male plant is occasionally different from that of the female; 
but an extensive comparative study of the forms suggests that there is 
great variability in habit, so that it seems impossible to distinguish 
the two sexual individuals by any morphological character except 
that they bear as a rule exclusively either male or female organs. 
VEGETATIVE MITOSIS IN BOTH MALE AND FEMALE INDIVIDUALS. 
Both male and female plants, in good condition, always have a 
hairy growth at the tips of the multifid filaments of the thallus. Any 
part of the frond in vigorous growth is favorable for the study of vege- 
tative mitosis, but details are more easily followed in the terminal 
hairs and in the superficial layer of the entire frond. 
Botanical Gazette, vol. 48] [38° 
