Boodle— Anatomy of the Schizaeaceae . 419 
Thomae, ’86 : Die Blattstiele der Fame. Jahrb. f. wiss. Bot., xvii. 
Van Tieghem, *88 : Sur le dedoublement de l’endoderme dans les Crypt. Vase. 
Jonrn. de Botan., ii, p. 404. 
’90 : Sur la structure de la tige des Preles. Journ. de Botan., iv. 
Walter, ’90 : Ueber die braunwandigen sklerotischen Gewebeselemente d. Fame. 
Bibliotheca botanica, iv. 
explanation of figures in plates 
XIX, XX, AND XXI. 
Illustrating Mr. Boodle’s paper on the Anatomy of the Schizaeaceae. 
The following lettering is used in several of the illustrations : e., endodermis ; 
x., xylem; px ., protoxylem; ph ., phloem; pph ., protophloem. Where x'., px' ., 
ph! ., pph'. are used, they refer to the xylem, protoxylem, phloem, and protophloem 
respectively of a petiole or leaf-trace, i. e., inner endodermis ; i. ph ., inner 
phloem. Figs. 1, 4, and 17 are reproduced from photographs by Dr. E. C. Bous- 
field ; Figs. 11, 38, and 44 are also from photographs. 
Fig. 1. Transverse section of rhizome of Lygodium dichotomum. The different 
layers may be easily recognized by comparison with Fig. 2. x 50. 
Fig. 2. Part of transverse section of rhizome of Lygodium dichotomum. s. 
layer of suberized cells; x. p ., one of the xylem-parenchyma-cells; si., silica- 
nodule in a xylem-parenchyma-cell. x 390. 
Fig. 3. Part of transverse section of young rhizome of Lygodium dichotomum. 
x 390- 
Fig. 4. Transverse section of petiole of Lygodium japonicum. x 75. 
Fig. 5. Silica-nodule from xylem- parenchyma of rhizome of Lygodium dicho- 
tomum. x 900. 
Fig. 6. Tracheide isolated by maceration from node of Lygodium dichotomum. 
x 90. 
Fig. 7. Part of a small sieve-tube in the rhizome of Lygodium dichotomum, 
showing sieve-plates and granules, x 900. 
Fig. 8. Section of seedling of Lygodium japonicum. f, foot ; p., prothallus ; 
x., diarch xylem of primary root, x 45. 
Fig. 9. Transverse section of seedling-stem of Lygodium japonicum , below first 
leaf, p., one of the xylem-parenchyma-cells. x 390. 
Fig. 10. Lygodium japonicum. First leaf-trace of the seedling, separating 
from the stele, x 390. 
Fig. 11. Schizaea dichotoma. Transverse section through a node, x about 30. 
Fig. 12. Schizaea digitata. Transverse section of young stem at node. a.,h., 
examples of outer and inner tracheide respectively developing first ; m,, pith, x 90. 
Fig. 13. Schizaea digitata. Transverse section of petiole near base, f., fibre, 
x 260. 
Ee 2 
