244 MESOZOIC FLORAS OF UNITED STATES. 



1844. Pteropliyllum DunJcerianum Gopp. : Uebersiclit d. Ai'beiten d. Schles. Ges. f. 



Vaterl. Kultur, 1843, p. 134. 

 1846. Pterofhyllum. Dwrikerianum. Gopp. Dunker: Monogr. d. Norddeutsch. 



Wealdenbildung, p. 14, pi. ii, figs. 3, 3a, b; pi. vi, fig. 4. 

 1846. Cycadites Morrisianus Dunk.: Op. cit., p. 16, pi. vii, fig. 1. 

 1849. Zamites DunJcerianus (Gopp.) Brongn.: Tableau, pp. 62, 107. 



1851. Dioonites Dunkerianus (Gopp.) Miq. : Tijdschr. v. d. Wis-en Naturk. Wetensch., 



Deel IV, p. 212 [8]. 

 1894. Dioonites DunJcerianus (Gopp.) Miq. Font, in Diller & Stanton: Bull. Geol. 

 Soc. Am., Vol. V, p. 450. 



Several specimens of a plant were found at locality No. 1 that agree 

 exactl}^ with the plant from the Glen Rose beds of Texas," which the 

 writer identified with Dioonites Dunkerianus (Gopp.) Miq. of the Wealden 

 of Hanover. The specimens show fragments of leaves, with portions of 

 leaflets attached to the midrib, and also fragmentary detached leaflets. 

 The midrili, as is shown in the fragment depicted in Fig. 15, is, as in the 

 Glen Rose plant, quite strong and rigid. The leaflets, as is the case with 

 the Texas fossil, are thick and rigid, with dense epidermis, and show no 

 nerves distinctly. From crumpling longitudinal^ they sometimes exhibit 

 what resembles a strong nerve, which on casual inspection might be taken 

 for the single nerve of a Cycadites. There can be no question that this 

 plant belongs to the same species as that from Texas, whether that is 

 D. Dunkerianus or not. 



Dioonites Buchianus (Ettingshausen) Bornemann.* 

 PI. LXVI, Figs. 16, 17. 



1852. Pterophyllum BucTiianum Ett.: Abh. d. k. k. Geol. Reichsanst., Vol. I, Abth. 



Ill, No. 2, p. 21, pi. i, fig. 1. 

 1856. ? Dioonites Buchianus (Ett.) Born. : Org. Rest. d. Lettenkohlengruppe 

 Thiiringens, p. 57. 



specific name would have to be restored had not Miquel in 1861 (Prodroraus systematic Cycadearum, p. 31 ) 

 referred the Oolitic species called Cycadites pecten by Phillips to the genus Dioonites, making the combination 

 Dioonites pecten (Phill.) Miq. The next oldest name is that of Goppert, 1844, and it happens that Miquel is 

 also responsible for this combination. — L. F. W. 



"Notes on some fossil plants from the Trinity division of the Comanche series of Texas: Proc. U.S. 

 Nat. Mus., Vol. XVI, p. 265, pi. xxxvi, fig. 12; pi. xxxvii, fig. 1. 



ti I have hesitated long before deciding to retain this combination in view of all that Nathorst (Denkschr. 

 Wien Akad., Vol. LVII, p. 46) and vSeward (Wealden Flora, Pt. II, pp. 7.5S') have said against placing this 

 species in Miquel's genus Dioonites, the former creating for it the genus Zamioph3'llum, and the latter referring 

 it to Zamites. But Professor Fontaine argues the case for himself. It is true that Bornemann referred Ettings- 



