. Fossil plants : for students of botany and geology . Paleobotany. 534 CYCADOPHYTAJSr FRONDS [CH. Heer, and Z. daravallensis^ Sap.; similarly Z. Schmiedelii And.^ is probably identical with Z. gigas. The Lower Cretaceous species Zamites iohemicus^ Vel. and Z. iburgensis* Hos. and von d. Marck represent very similar forms. Zamites recta (Tate). This species was originally described by Tate^ as Palaeozamia (Otozamites) recta from Wealden strata in South Africa and sub- sequently transferred to Zamites^; it bears a very close resem- blance to Z. gigas. The fronds bear alternate hnear pinnae atta
. Fossil plants : for students of botany and geology . Paleobotany. 534 CYCADOPHYTAJSr FRONDS [CH. Heer, and Z. daravallensis^ Sap.; similarly Z. Schmiedelii And.^ is probably identical with Z. gigas. The Lower Cretaceous species Zamites iohemicus^ Vel. and Z. iburgensis* Hos. and von d. Marck represent very similar forms. Zamites recta (Tate). This species was originally described by Tate^ as Palaeozamia (Otozamites) recta from Wealden strata in South Africa and sub- sequently transferred to Zamites^; it bears a very close resem- blance to Z. gigas. The fronds bear alternate hnear pinnae attached to the upper face of the rachis by a slightly contracted and swollen base. The lamina has an acuminate asymmetrical apex and the upper edge is slightly falcate; the larger pinnae are over 6 cm. long and nearly 1 cm. broad; the veins are frequently forked as they converge towards the base of the lamina. No clear evidence of association of these fronds in the Uitenhage series of South Africa with William- sonia flowers has been discovered, but a specimen' in the Tate collection in the British Museum may be a badly preserved cluster of bracts belonging to a Williamsonia. The rachis of this species shows some peculiar features in the form of two rows of alternate cushions in some partially decayed specimens. One of these is shown in fig. 600; the cushions are raised oval projections with a flat top, and pieces of the rachis without ^<*- ^00. pinnae might easily be a Coniferous Zamites recta. (Uitenhage series, S. Africa.) Zamites Carruihersi Seward. A species founded on specimens from the Wealden of Sussex* and recorded from Kimmeridge beds in Scotland^, characterised 2 Andrae (53) A. PI. ix. 1 Saporta (75) A. PI. xcm. " Fric and Bayer (01) B. fig. 43, p. 92. " Hosius and von der March (80) B. PI. XLlv. fig. 202. ' Tate (67) PI. v. fig. 7. « Seward (03) B. p. 21, Pis. m. v. 8 Seward (95) A. p. 86, PI. vi. » Ibid. (W) p. \ ' No. 11117. t, PI.
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