Woodworth . — The Apical Cell of Fucus. 
2 1 1 
EXPLANATION OF FIGURES IN PLATE X. 
Illustrating Mr. W. M c Micliael Woodworth’s paper on the Apical Cell of Fucus. 
Fig. i. Section through the growing tip of Fucus furcatus, made at right angles 
to the broad surface of the frond. A initial cell, A', A", A'", A"" lateral segments 
of the initial cell, x 400. 
Fig. 2. Section made at right angles to the last, parallel to the broad surface of 
the frond.- Lettering the same as in fig. 1. x 400. 
Fig. 3. Section across the tip of F. furcatus. The initial cell A is here seen in 
cross section, the section being through the base. The lateral cells appear larger 
than natural on account of their being cut obliquely, x 400. 
Fig. 4. Tip of F. furcatus , showing the terminal depression. Somewhat dia- 
grammatic. X 10. 
Fig. 5. A portion of the frond of F. furcatus , showing the truncated tips con- 
taining the depression shown in fig. 4. x about 2. 
