MARCHiNTITBS. 49 



Group BEYOPHYTA (MUSCINE^). 



Class HEPATICJE. 



The vegetative plant-body possesses a different organization on 

 the ventral and dorsal sides ; it has the form of a thaUoid creeping 

 plant (thalloid Liverworts), or of a delicate stem, with thin 

 appendages or leaves without a midrib (foliose Liverworts). 



Order MAEOHANTIE^. 



Genus MARCHANTITES, Brongniart. 



[Tableau veg. foss. p. 12, 1849.] 



Vegetative body of laminar form, with apparently dichotomous 

 branches, agreeing in habit with the recent thaUoid Hepaticae, 

 as represented by such a genus as Marohantia. 



Marchantites erectus (Leek., ex Bean MS.). 



[Leckenby, Quart. Journ. Geol. Soc. vol. xi. p. 76, 1864.] 

 (PL XIX. Fig. 2 ; Text-fig. 2.) 



1837. Fueoides arcuatus, Lindley & Hutton, Foss. Flor. vol. iii. pi. 185. 



1838. Sphcsrococcites areuatus, Sternberg, Flor. Vorwelt, vii. p. 104. 

 1850. Spheerococcites arcuatus, Unger, Gen. spec, plant, foss. p. 26. 



1864. Fueoides arcuatus, Leckenby, Quart. Joum. Geol Soc. vol. ix. p. 70. 

 1864. Fueoides erectm, ibid. p. 81, pi. xi. figs. Za, i. 

 1869. Haliseris ereeta, Schimper, Pal. Teg. vol. i. p. 185. 

 1875. Fueoides arcuatus, Phillips, Geol. Torks. p. 195, Lign. 1. 

 i Fueoides diffisus, ibid. p. 106, Lign. 2. 

 Fueoides erectus, ibid. p. 196, Lign. 3. 

 1898. Marchantites erectus, Seward, Fossil Plants, vol. i. p. 233, fig. 49. 



Type-specimen. Woodwardian Museum, Cambridge (Leckenby 

 CoUection, No. 1). Text-fig. 2. 



Thalloid body, divided into spreading, dichotomously branched 

 segments, obtusely pointed apically. The slightly wrinkled surface 



