1 62 Barber. — The Structure of P achy theca. II. 
EXPLANATION OF FIGURES IN PLATE IX. 
Illustrating Mr. C. A. Barber’s paper on Pachytheca. 
Fig. i. Radial section of one half of Pachytheca , from a photograph, x 32. 
Fig. 1 a. A small portion of the same section, from a photograph, x 160. 
Fig. 2. Tangential section through the other half of the same specimen, from a 
photograph. x 32. 
Fig. 2 a. A few cells of the same section (drawn), x 270. 
Fig. 3. A small portion of an oblique section through the same half as in Fig. 2 
(drawn). x 320. 
Fig. 4. A slightly oblique section of Pachytheca on Slide 5, from a photograph, 
x 32. 
Fig. 5. A small portion of section 6 (drawn). This corresponds in position with 
the clear fused zone bordering the medulla externally in Fig. 5. x 320. 
Fig. 6. A portion of the, cortex of specimen 7 (drawn), x 320. 
Fig. 7. Tangential section through specimen 8, from a photograph, x 37. 
Fig. 8. A few granular cell-filaments from Slide 9 at the junction of cortex and 
medulla, showing the continuity of the cortical and medullary filaments, x 320. 
Fig. 9. A small portion of the periphery of specimen 10, showing what ap- 
pears to be the external boundary of the plant. The branching and swelling is 
pronounced (drawn), x 270. 
Fig. 10, Section of specimen 11 showing the absence of any zone of oval bodies. 
(From a. photograph.) x 32. 
