ofUlodendron to Lepidodendron, &c. 125 



entirely agree. I hope, however, that the evidence here brought 

 forwai-d may be considered a sufficient foundation for the 

 opinions I have adopted. 



The subject is treated under four divisions : — 



I. Epitome of the views of previous writers on Uloden- 

 dron. 

 II. Descriptions of specimens. 

 ]II. General conclusions. 



IV. Synonymy and Notes on the three species specially 

 considered in this communication. 



I. Epitome of the Views of peevious Weiters on 



Ulobendson. 



1817. Steinhauer. American Philosophical Society, vol. i. 

 new series. (Communicated May 2, 1817.) — The earliest 

 figured fossil plant which can be referred to Ulodendron^ 

 Lindley and Hutton, appears to be that described by Stein- 

 hauer in 1817 as Phytolithus parmatus. Under this name, 

 however, he included two plants which belonged to distinct 

 genera. His fig. 1, pi. vi., is referable to Calamitina, Weiss, 

 and is probably Calamitina Gerinanana, Goppert, sp. * ; that 

 on pi. vii. fig. 1 is referable to Leindodendron^ and though 

 the specimen does not show the form of the leaf- scars di- 

 stinctly, the general character of the fossil points to the pro- 

 bability of its belonging to Lepidodendon Veltheimianum, 

 Sternberg. 



1820. Khode. Beitrage zur Pflanzenkunde der Vorwelt. 

 — Under the somewhat comprehensive title of " Schuppen- 

 pflanzen," this author gives, on pi. iii. fig. 1, a very fair 

 figure of Lepidodendron Veltheimianum ^ showing the Uloden- 

 droid scars. On the lower part of these scars (on the upper 

 part, as represented by Rhode, whose figure is inverted) are 

 seen the remains of the leaf-scars, and on the isolated Ulo- 

 dendroid scar, figure 4 B of the same plate, the medial line of 

 the leaf-scar is clearly indicated. Rhode believed that the 

 Ulodendroid scars on this specimen were flowers, the leaf- 

 scars on its surface the petals. Although this view is crude, 

 his drawings of Ulodendron are not so inaccurate as is 

 sometimes supposed. The other figures which, he gives of 

 these Ulodendroid Lycopods have not been taken from well- 

 preserved specimens. 



* Weiss, "Steinkolilen-Calamarien" ( Abhandl. zur geologischen Special- 

 karte Ton Preussen und den Thiiringischen Staaten, Band ii. Heft 1), 

 p. 126 (1876). Cyclocladia major, Lindley and Hutton, 'Fossil Flora,' 

 vol. ii. pi. cxxx., also appeajrs to be referable to Calamitina, Weiss. 



Ann. & Mag. N. Hist. Ser. 5. Vol. xvi. 10 



