THE KARROO SYSTEM 215 



the south-west of the Stormbergen. Some of these 

 pebbles show pitting externally due to the formation of 

 cubes of pyrites, a layer of which occurs just below the 

 surface. 1 The Molteno beds attain their maximum 

 thickness of a little over '2,000 feet in the Division of 

 Xalanga; in the Stormberg area they are thinner, and 

 in Aliwal North and Herschel it is probable that their 

 thickness does not exceed 1,200 feet. 



(For an account of the coals in this formation, see 

 chapter xiv.) 



The following is a list of the fossil plants hitherto 

 discovered in the Molteno beds and described by Feist- 

 mantel 2 and Seward 3 : 



Schizoneura carrerei, Zeill. 

 Stenopteris elongata, Carr. 

 Thinnfeldia odontopteroides, Morr. 

 ,, rhomboidalis, Ett. 



,, sphenopteroides, Sew. 



Taeniopteris carruthersi, Ten. -Wood. 

 Callipteridium stormbergense, Sew. 

 Cladophlebis (Todites) roesserti, Presl. 

 Baiera moltenensis, Sew. 



,, stormbergensis, Sew. 



schencki, Feistm 

 Chiropteris zeilleri, Sew. 

 cuneata, Carr. 



Phoenicopsis (Desmiophyllum) elongatus, Morr. 

 Pterophyllum, sp. 



The occurrence of some reptilian remains at Molteno 

 was noted by Dunn. 



^chwarz, Rec. Albany Museum, i., p. 341, 1905. 



2 0. Feistmantel, " Uebersichtliche Darstellung der Geologisch-Paloeon- 

 tobgischen Verhaltnisse Siid-Afrikas," Abh. der konigl. bohm. Gesell.der 

 Wiss., vii., 3, 1889. 



y A. C. Seward, A. S. A. M., vol. iv., pt. i., 1903 ; Q. J. G. 6'., p. 83, 1908. 



