88 Sykes . — The Anatomy and Morphology of Tmesipteris . 
Dangeard, M. P. A. : Notes sur les Mycorrhizes endotrop’niques. Le Botaniste, ii, p. 223. 
Ford, S. O. : Anatomy of Psilotum. Ann. of Bot., xviii, 1904. 
Gwynne-Vaughan, D. T. : Observations on the anatomy of solenostelic Ferns. I. Loxsoma. Ann. 
of Bot., xv, 1901. 
Hickling, G. : The anatomy of Palaeoslachya vera. Ann. of Bot., 1907. 
Jeffrey, E. C. : Structure and development of the stele in Pteridophyta and Gymnosperms. 
Phil. Trans. B., vol. cxcv, 1902, p. 144. 
Jennings, V., and A. Hall : Tmesipteris. Proc. Roy. Irish Acad., 1895. 
Lang, W. II. : On a Prothallus provisionally referred to Psilotum. Ann. of Bot., xviii, 1904. 
Lignier, O. : Equisetales et Sphenophyllales. Bull, de la Soc. Linn, de Nor., Caen, 1903, p. 95. 
Poirault, G. : Recherches sur les Cryptogames vasculaires. Ann. des Sci. Nat. Bot., 7® ser., 
tome xviii. 
Renault, B. : Etudes des Gites mineraux de la France. Bassin Houiller et Permien d’Autun et 
d’Epinac, 1896, IV. 
Russow, E. : Vergleichende Untersuchungen. Memoires de l’Academie imperiale des Sciences de 
St-Petersbourg ; 7® serie, tome xix, No. t. 
Scott, D. H. : Studies in Fossil Botany. London, 1900. 
: The old wood and the new. New Phytologist, i. 
• On Cheirostrobus, &c. ; Phil. Trans. B., vol. clxxxix, 1897, and Proc. Roy. Soc., 1897. 
: The present position of Palaeozoic Botany. Progressus rei Botanicae, i, 1907, p. 139. 
Solms-Laubach, Graf zu : Der Auf bau des Stockes von Psilotum triquetum und dessen Entwicke- 
lung aus der Brutknospe. Ann. du Jardin Bot. de Buitenzorg, vol. iv, 1884. 
Strasburger, E. : Einige Bemerkungen iiber Lycopodiaceae. Bot. Zeit., 1873. 
Tansley, A. G. : Evolution of the Filicinean vascular system. New Phytologist, Feb. 1907. 
Thomas, A. P. W. : The affinity of Tmesipteris with the Sphenophyllales. Proc. Roy. Soc., 1902, 
P- 343- 
EXPLANATION OF PLATES VII AND VIII. 
Illustrating Miss Sykes’ paper on Tmesipteris. 
The figures were drawn with the aid of Swift’s £ and } lenses, No. 3 ocular, and a Zeiss- Abbe 
camera-lucida. 
Fig. 1. Transverse section of the rhizome near the apex; a = cortical cell containing starch; 
b — cortical cells filled with fungus hyphae ; c = rhizoid. x 116. 
Fig. 1 a is a single cell of the endodermis of the rhizome (more highly magnified than in Fig. 1), 
showing starch contents and the thickenings on its radial walls. Fig. 1 b is a single cortical cell of 
the rhizome, magnified as Fig. 1 «, and showing a large number of fungus hyphae. x 400. 
Fig. 2. Transverse section taken from the base of a large aerial stem; a — innermost layer of 
cortical cells, containing a brown substance ; in 1 = base of very small scale-leaf in transverse section ; 
ni 2 ■= larger scale-leaf with stomata and assimilating tissue, but no vascular supply; at a 1 one of a few 
cortical cells opposite this scale-leaf is seen to be invaded by the brown substance which surrounds the 
stem stele ; m z «= group of stem stele in which the protoxylem is in the act of dividing to give rise 
to the first leaf-trace, x 78. 
Fig. 3. First leaf-trace in its passage through the cortex. This is the leaf-trace seen arising in 
Fig. 2, m z , and supplies the last scale-leaf, x 400. 
Fig. 4 a, b, c, are successive sections of a series taken near the apex of an aerial stem. They 
show three stages in the formation of a branch stele, x 116. 
