Boodle.—Anatomy of the Hymenophyllaceae. 495 
EXPLANATION OF FIGURES IN PLATES 
XXV, XXVI, AND XXVII. 
Illustrating Mr. Boodle’s paper on the Anatomy of the Hymenophyllaceae. 
The following lettering is used in most of the illustrations:— sc., sclerenchyma ; 
e., endodermis ; ph., phloem ; pph ., protophloem; px protoxylem ; x., metaxylem ; 
u., upper xylem-band ; lower xylem-band; r., tracheides connected with a root. 
Where x 1 , px 1 , ph 1 are used they refer to the metaxylem, protoxylem, and phloem 
respectively of a petiole or leaf-trace. 
Figs. 22 and 24 are reproduced from photographs by Dr. E. C. Bousfield of 
sections prepared by Mr. D. T. Gwynne-Vaughan. 
PLATE XXV. 
Fig. 1. Diagram of transverse section of the rhizome of Hymenophyllum scahrum. 
The lump at the left-hand end of the lower xylem-band is connected with a root, 
x 55- 
Fig. 2. Transverse section of stele of young rhizome of H. scabrum. x 190. 
Fig. 3. Transverse section of stele of older rhizome of H. scabrum. x 190. 
Fig. 4. Transverse section of stele of mature rhizome of H. scabrum. x 190. 
Fig. 5. Diagram of transverse section of rhizome of H. demissum , var. nitens. 
x 45- 
Fig. 6. Diagram of transverse section of petiole of H. dilatatum , var. 
Forsterianum. x 50. 
Fig. 7. Transverse section of vascular bundle of petiole of II. dilatatum, var. 
Forsterianum. x 260. 
Fig. 8. Transverse section of vascular bundle of petiole of H. dilatatum , var. 
Forsterianum , a short distance above axillary branch, x 385. 
Fig. 9. Transverse section of node of H. dilatatum, var. Forsterianum. s., stele 
of rhizome ; l.t., leaf-trace; br., axillary branch, x 90. 
Fig. 10. Transverse section of node of H. dilatatum , var. Forsterianum. Stele 
of rhizom§ on the right, leaf-trace on the left, x 200. 
Fig. 11. Transverse section of node of H. dilatatum , var. Forsterianum. Stele 
on the left, and leaf-trace on the right partly fused, x 200. 
PLATE XXVI. 
Fig. 12. Transverse section of node of H. dilatatum, var. Forsterianum ; further 
stage of fusion. Stele of rhizome on right, leaf-trace on left, x 200. 
Fig. 13. Transverse section of rhizome of II. sericeum. x 260. 
Fig. 14. Transverse section of rhizome of H. fucoides. x 235. 
Fig. 15. Transverse section of petiole oi II. fucoides. x 235. 
Fig. 16. Transverse section of rhizome of H. tunbridgense. x 380. 
Fig. 17. Transverse section of petiole of II. tunbridgense. x 390. 
Fig. 18. Transverse section of rhizome of rather large plant of H. cruentum, 
x 390. 
