Miscellanea. 309 



very strong midrib running throughout ; secondary nerves un- 

 known. 



If this be truly a Pecopteris, it is distinct from all others by its 

 very narrow, linear leaflets. The only plant I have seen at all 

 resembling it is the Zamites obtusifolius from the shale of the 

 oolitic coal-fields of Blackheath, Richmond, United States, exhibited 

 some weeks since by Mr. Lyell to the Geological Society. The 

 specimens alluded to of this latter plant seem imperfectly preserved, 

 but still show, on some portions of the pinnules, a neuration run- 

 ning parallel with a strong midrib. This great midrib seems to 

 me incompatible with Zamites, so that, although I point to the 

 resemblance between the American and Australian plants, I prefer 

 placing the latter provisionally in Pecopteris, as I have seen no 

 trace in my imperfectly preserved specimens of a parallel neuration ; 

 and even if it should hereafter be found to exist, I conceive it 

 would be necessary to form a new genus, intermediate in form, 

 neuration, and (I think) mode of attachment of the pinnules to the 

 rachis, between Zamites and Pecopteris, for the reception of those 

 two plants. 



One specimen has occurred in the fine sandstone of Clark's Hill, 

 N. S. Wales. 



Class Endogens. {Al. Palmales). 



Ord. Palmace^. 

 Zeugophyllites elongatus (Mor.). 

 Common in the shales of Mulubimba, N. S. "Wales. 



Class ExoGENS. {Al. Amentales). 

 Ord. Casuarinace^ (?). 

 Phyllotheca (Br.). 

 M. Brongniart, in his 'Prodrome,' founds this genus for a single 

 species, the P- australis, of which he mentions having a large 

 number of well-preserved specimens, which he describes as " des 

 tiges simples, droites, articulees, entourees de distance en distance 

 par des gainesappliquees contrecettetige,commedansles Equisetum, 

 mais terminees par de longues feuilles lineaires, qui remplacent 

 les dents courtes des gaines des Preles. Ces feuilles sont ou d#s- 

 sees, ou plus souvent etalees,et meme reflechies; elles sont lineaires, 

 aigues, sans nervure distincte, au moins deux fois plus longues 

 que la gaine. Les gaines elles-memes presentent de legers sillons 

 longitudinaux, qui disparaissent vers la base, et qui semblent cor- 

 respondre a I'intervalle des feuilles, comme les sillons des gaines 

 des Equisetum correspondent a rintervalle des dents. _ La tige, 

 dans I'espace qui separe les gaines, paroit lisse ; mais sur des 

 fragmens de tiges un pen plus grosses, qui appartiennent probable- 

 menta des individus plus ages, de la meme plante, on voit des stries 

 regulieres, presque comme sur les Calamites." While, on the 

 other hand, Messrs. Lindley and Hutton in their ' Fossil Flora 

 (article Uippurites gigantea) state, that having examined specimens 

 communicated by Dr. Buckland (from whom also Brongniart 

 received his), they found Brongniart's description inaccurate, and 

 that the leaves, instead of springing from the edge of the sheath, 

 arise immediately from the stem, and having in addition to the 



