REVIEWS 193 



territory, although the complex structure hardly admits of correla- 

 tion without paleontological aid. 



In the following paragraphs the general paleontological features of 

 the three stages will be outlined, together with the correlations pro- 

 posed by Zeiller. To this will be added comments on certain of the 

 Heraclean plant types with some suggestions as to the relations of the 

 Heraclean Carboniferous floras to those of eastern North America. 



A. The lowest of the three paleobotanical stages recognized by 

 Zeiller in the material examined is that of Aladja-Agzi. In the col- 

 lections from several localities representing this stage in the various 

 areas, he finds : x 



Sphenopteris dicksonioides,* S. bermudensiformis, S. Zarischi,* S. 

 divaricata* Rhodea cf. Stachei, Diplotmema dissectum, D. elegans,* 

 Adiantites oblongifolius* Pecopteris aspera, Archceopteris, sp., Card- 

 iopteris polymorpha, Sphenophylhim tenerrimum* Asterocalamites scro- 

 biculatus* Catamites ostraviensis, C. ramifer* Lepidodendron acumi- 

 natum* and Lepidophyllum lanceolatum. 



Two additional species are described as new, viz.: Sphenopteris 

 bithynica and Sphenophyllum Sewardi. 



Of the previously described species, all in the above list, with the 

 exception of the undeterminable Archceopteris and the Lepidophyllum 

 lanceolatum are also present in the Ostrau-Waldenburg (Upper Culm) 

 stage of Silesia, with which the Aladja-Agzi flora is correlated by Pro- 

 fessor Zeiller. The species marked by the asterisk (*) in the above list 

 are also recorded from the Appalachian Pottsville, with whose lower 

 portion the Ostrau-Waldenburg beds are probably, in part, at least, 

 contemporary, as has already been elsewhere 2 indicated. Of the 

 remaining plants Sphenopteris bermudensiformis is evidently closely 

 related to a form from the Pottsville referred to .S. asplenioides ; 

 while the specimens figured as Diplotmema dissectum appear to find a 

 corresponding form in the latter formation. Sphenopteris bithynica 

 seems to be extremely close to .S. subfurcata Dn. from the supposed 

 "Middle Devonian" [Pottsville] at St. John, N. B., while Sphenophyl- 

 lum Sewardi stands in a similar relation to .5. tenue 3 from the Welch 



1 The nomenclatural orthography in the following list is that used by Professor 

 Zeiller. 



2 Bull. Geol. Soc. Amer., Vol. VI, p. 320, 1895. See also: Twentieth Annual 

 Rept. U. S. Geol. Surv., Pt. II, p. 912. 



3 Twentieth Annual Rept. U. S. Geol. Surv., Pt. II, 1900, p. 900, PI. CXCI.Figs. 6, 7. 



