xxii STUDIES IN FOSSIL BOTANY 



FIG. PAGE 



hi. Pteridotheca Butterworthii. Fragment of a Fern-frond with 



sporangia ..... 292 



112. Pteridotheca, Williamsonii. Group of annulate sporangia 293 



113. Psaronius brasiliensis. Transverse section of stem . . 299 



114. Psaronius Renaulti. Part of transverse section of stem 302 



115. Zygopteris Grayi. Transverse section of stem 308 



116. ,, ,, Transverse section of stele . 309 



117. Zygopteris corrugata. Transverse section of an " Aphlebia " 313 



118. Zygopteris bibractensis. Transverse section of a petiole . . 316 



119. Zygopteris, sp. 1. Group of four sporangia. 2. Sporangia 



enlarged. 3. Group of sporangia in transverse section . 320 



120. Asterochlaena laxa. Part of transverse section of stem 324 



121. Botryopteris hirsuta (Will.). Transverse section of stem . . 327 



122. tl ,, Transverse section of vascular bundle of 

 young petiole . . 329 



123. Botryopteris forensis. Group of sporangia 330 



124. Botiyopteris. Group of sporangia . 331 



125. ,, Sporangium in transverse section . 333 



126. Stauropteris oldhamia. Transverse section of vascular bundle 



of main rachis .... 



127. Stauropteris oldhamia. Three sporangia inserted terminally on 



ultimate branches of the rachis . . . 338 



128. Stauropteris oldhamia. Four germinating spores from the 



interior of a sporangium . . 339 



129. Lyginodendron oldhamium. Transverse section of stem 359 



130. ,, ,, Transverse section of stem and foliage 360 



131. , , ,, Primary xylem strand 364 



132. , , ,, Double leaf- trace . 365 



133. Stangeria paradoxa. Double bundle from petiole . 365 



134. Lyginodendron oldhamium. Transverse section from outer part 



337 



of stele 



367 



r 35- Lyginodendro?i oldhamium. Transverse section of a very young 



stem . 3 6 g 



136. Lyginodendron oldhamium. Vegetative gland . . . 370 



J 37- 11 ,1 Transverse section of branching 



stem . 



1 39- ,1 ,1 Transverse section of rachis 



I 4°- ., ,, Vertical section of a leaflet 



1 4 I - ,. ,, Transverse section of root 



section 



371 



138. Lyginodendron oldhamium. Radial section of stem 374 



375 

 377 

 379 



J 42. , , ,, Radial section of stem, showing root 382 



: 43- Lagenostoma Lomaxi. Longitudinal section of a small seed . 387 



144. Lyginodendron {Lagenostoma Lomaxi). Restoration of the 



seed .... 3 8 7 



145- Lagenostoma Lo?naxi. Capitate gland on the cupule 388 



146. Lyginodendron oldhamium. Capitate gland on the petiole 388 



147. Lagenostoma Lomaxi. Apex of seed 

 x 4 8 - .. .. Diagram of seed in median longitudinal 



389 



t ' 39° 



149. Lagenostoma Lomaxi. Diagrammatic transverse sections . . 3gI 



150. Lagenostoma Sinclairi. Portion of branched rachis bearing seeds 394 

 IS 1 - " .. Two seeds , q _ 

 152. Crossotheca Honinghausi. Fertile pinna . . t^Z 

 J 53- .. .. Fertile pinna in connection with 



sterile pinnae of Sphenopteris Honinghausi . . , q8 



