Chandler . — Vascular Slrands in Ferns . 
410 
Lachmann. Contributions, & c. Thesis presentee a la Faculty des Sciences de Paris. Ser. A, 
No. 1 16. 
Leclerc du Sablon. Recherches sur la formation de la tige dans les Fougeres. Ann. Sc. Nat., 
7® ser., t. xi. 
Schoute. Die Stelar-Theorie. Groningen, 1902. 
Seward and Ford. The anatomy of Todea . Trans. Linn. Soc., 2nd ser., vol. vi. 
Tansley. The Stelar Theory. Science Progress, 1896. 
Tansley and Lulham. (i) On a new type of Fernstele. Annals of Botany, xvi. 
(2) The vascular system of the rhizome and leaf-trace of Pteris aquilina , 
L., and Pteris incisa, Thunb., var. integrifolia , Beddome. New Phytologist, iii, 1904. 
Tansley and Chick. On the anatomy of Schizaea malaccana. Annals of Botany, xvii. 
Trecul. Remarques sur la position des trachees dans les Fougeres. Ann. Sc. Nat., 5® ser., t. xii. 
Van Tieghem. Sur la polystelie. Ann. Sc. Nat., 7® s6r., t. iii. 
Zenetti. Das Leitungssystem im Stamm von Osmunda regalis. Bot. Zeit., 1 895. 
EXPLANATION OF FIGURES IN PLATES 
XVIII, XIX, AND XX. 
Illustrating Dr. Chandler’s paper on the Vascular Strands in Ferns. 
In the diagrammatic figures the following scheme has been adopted : — Endodermis : Represented 
by a broken line. Phloem : Shaded. Xylem : Unshaded. 
Figs. 1- 1 2. Doodia as per a, R. Br. 
Figs. 1 3-35. Lomaria gibba, Labill. r. root. 
Figs. 36-50. Nephrodiuni hirtipes, Hk. r. root, It. leaf-trace. 
Figs. 51-76. Lomaria Spicant , Desv. r. root, It. leaf-trace. 
Figs. 77-90. Asplenium nidus, L. St. Sieve-tube, r. root, It. leaf-trace, i.e. internal endodermis. 
Figs. 91-128. Polypodium aureum , L. Lt . leaf-trace, d. It. double leaf-trace, r. root, p. s. 
petiolar strand. 
Figs. 1 2 9- 1 3 2. Aspidium falcatum, Sw. //.leaf-trace. 
Figs* 1 33— 1 5 1 • Nephrolepis cordifolia, Hk. c. s. cauline strand, stl. stolon, px. protoxylem, 
r. root, It. leaf- trace. 
Figs. 152-164. Asplenium bulbiferum , Forst. E. Endodermal cells. It. leaf-trace, r. root. 
Figs. 165-171. Aspidium Tsus-Simense , Hk. It. leaf-trace. 
Figs. 172-196. Nothochlaena sinuata, Kaulf. Lt. leaf-trace, r. root, scl. sclerenchyma, 
Fig. 197. Doodia aspera, R. Br. Protostele. 
Fig. 198. Doodia aspera , R. Br. Differentiation of parenchyma at the centre of the solid 
xylem rod ; p. parenchyma cells. 
Fig. 199. Doodia aspera , R. Br. Differentiation of internal phloem ; ph . phloem. 
Fig. 200. Doodia aspera , R. Br. Transverse section of cauline vascular system after the exit of 
the first leaf-trace. 
Fig. 201. Doodia aspera , R. Br. Transverse section of cauline system after the repair of the 
first leaf-gap ; st. sieve-tubes. 
Fig. 202. Nephrodium setigerum , Baker. Transverse section of the vascular system before the 
differentiation of the first leaf-trace. Isolated tracheides are shown in the central phloem. 
Fig. 203. Nephrodium setigerwn, Baker. Transverse section through vascular system at the 
region of a ground-tissue pocket ; i.e. inner endodermis, 0. e. outer endodermis, It. leaf-trace. 
Figs. 204-207. Polypodium aureum , L. Transverse sections of petiole at successively higher 
levels, showing the gradual fusion of the two petiolar strands. 
Fig. 208. Polypodium aureum , L. Transverse section of rhizome showing wound-periderm. 
