Scientia Sinica

No. 1

SZE: CORRELATION & AGE OF YENCHANG FLORA 155

[10a] [10b] [11]

[12a]

[15] [16]

[17] [18a] [18b] [18c]

[18d] [18e]

Heer, O., 1877. Flora fossilis Helvetiae, Nachtrag z. Triasflora:

—_—.,, Ibid. p. 69, pl. 24) figs. 7-12, ete.

Florin, R., 1936. Die fossilien Ginkgophyten von Franz-Joseph-Land nebst Erorterungen tiber vermeintliche Cordaitales mesozoischen Alters, I. Spezieller Teil. Paleontographica, Bd. 81, Abt. B, Stuttgart. ,

Krausel, R., 1943. Die Ginkgophyten der Trias von Lunz in Nieder-dsterreich und yon Neue Welt bei Basel. Untersuchungen zur mesozoischen Florengeschichte des alpinen und stiddeutschen Raumes II. Paleontographica, Bd. LXXVII, Abt. B, Lief; 2.

, lord. p. 72; pl. 1, figs. 1-8; pl. II, figs. 1-8; pl. III, figs. 1-5; textfigs. 6-7. , Ibid. p. 75, textfig. 1,

Fontaine, W. M., 1863. Contributions to the Knowledge of the Older Mesozoic Flora of Virginia. U. S. Geol. Surv. Monographs, Vol. 6, Washington.

, Ibid. p.45, pl. XXI, figs. 3, 4; pl. XXIV, figs. 3-5; pl. XXV, fig. 1.

, Ibid. p. 46, p. 49, fig. 2.

, Ibid. p.51, pl. XXVII, figs, 2, 2a.

, Ibid. p. 52, pl. XXVII, fig. 4.

, Ibid. p. 80, pl. 43, fig. 1; pl. 44, figs. 1, 2; pl. 45, figs. 1, 2: , Ibid, pl. 11, figs. 1-3.

, Idid. p. 61, 116; pl. XXXI, figs. 1, 2; pl. LIV, fig. 8.

, Ibid. p.59, 116; pl. XXX, figs. 1, 2, 2a, 4, 4a; pl. LIV, fig. 8. , Ibid. p. 87, pl. 46, 47, fig. 1.

Lundblad, A. B., 1950. Studies in the Rhaeto-Liassic Floras of Sweden. I. Pteridophyta, Pteridospermae & Cycadophyta from the Mining District of New Scania. K. Svenska Vet, Akad. Handl., Fjarde Serien. Bd. I, No, -8, Stockholm.

Sze, H. C., & Lee, H. H., 1951. Notes on a Rhaetic Species Danaeopsis fecunda Halle from the Yenchang Formation of Kansu. Sei. Rec., Vol. 4, No. 1.

Frentzen, K., 1933. Equisetaceen des germanischen Keupers. Palzontolog. Zeitschrift, Bd. 15.

Jongmans, W. J., 1915. A Monograph of the Calamites of Western Europe. Mededeelingen van de Rijksopsporing van Delfstoffen, No. 7, Vol. I.

Bpak, M. WY. 1952. Mexomaemaa dbmopa u eTrpaturpadua HmKHeMe€8030HCKHX OTIOMKeHHu Oaccelina CpeqHero TeueHuA P. HIeK B 3allayqHOM Ka3axcTaHe. JTocreonmu3mat.

, Ibid. pl. VII, figs. 1-7, fig. 106. , Ibid, pl. XV.

, Ibid. PI.IV, figs. 1-6.

, Ibid, Pl. 1, figs. 1-5.