"II 



MUSEUM OF COMFAKATIVK ZOOLOGY. 



45 



2 A n 



Conifers. — Leaves of WalcJiia lomjifoUa Goepp. No. ^0. 



Leaves of AhUiites Goepp. Fragments iu many speeiniens. ISTo. 21. 



Leaves of Ulhiiannia fnimentarla Goejip., and IL Bronnii, No. 1, abouiid. 



Brauchea and leaves of JValchia piniformis, No. 3, in, plenty of .specimens. 

 CoRDAiTE^g. — Cordailes horasdfulius ling-. Very line speciuicn. No. 4. 



Fragments of leaves of Oordaites species. No 22. 



CanUocarpits orbicularis Gtiepp. No. 24. 



Cardiocarpns species nov., allieil to C. gihberosus Gein. No. 25. 



Carpolilkes species, one referable to G. hamidus Ileer, the other, very 

 small Ijut in ])lenty of specimens, to 0. Geinitzi Heer, Perm. PlI. of 

 Funkirchen, Fl. XXIl. figs. 5, G, 7, 8, and 13. These are all mixed 

 ■with ground fragments of scales, leaves, etc. of JValchia and Ullmanuia. 

 No. 26. Sanre as No. 16 of the colleclion of the Museum of Comparative 

 Zoology. 



On tho above species of vegetable remains I add a few remarks in 

 regard to their evidence for the determination of the age of the forma- 

 tion where they have been found. 



The genus Sphenophj/llam ruugcs from the Silurian to the base of the 

 Permian, as far as known, at least, by tho present state of our knowl- 

 edge in vegetable palaeontology. Tln-ee species of the genus are recorded 

 by German authors, as from the Permiau : Sphenojihyllum Schlotkeimii, 

 S. emarginatum, and S, loiigifoUmn. But all ai'e from the lower strata 

 of tho Old Eed Sandstone, whose flora is so intimately connectetl by its 

 characters with that of the Upper Carboniferous that the exact limita- 

 tion between the formations has not been fixed. It is tho same with 

 the Permo-Carboniferous strata of Virginia, wlierefrom a number of spe- 

 cies of SpheiiopJu/llam are described by White and Fontaine. Here we 

 are not yet in the true Permian. A very small and obscui'c fragment of 

 a Sjjhenophylkmi species is described by Geinitz, Naclitr. zur Dyas, L, 

 p. 10, PL I. figs. 22, 23. It is as yet the only trace of the genus in 

 the Middle Permian. The specific characters are not discernible, and 

 the author remails that he 1ms published it only because it is as yet tho 

 only species of Sj'heuophyllam found in tlie Permian of Germany, The 

 presence of two species of this genus in the s])cciLuons of Fairphiy' would 

 be already sufficient authoi-ity for referring tho formation to the paleo- 

 zoic time. 



In the Ferns, the s])ecimens represent Nenropteris Lim-hii, a species 

 found already in the whole thickness of the Carboniferous, and also in the 

 Permian of Europe. Pecoptevis arhoremim, Upper Carboniferous and 

 Lower Permian. Gallipteris covferia, one of the more abundant species of 

 the Permian in Europe, and found until ngw on this continent only in 



