Sir H. Howorth — Chalky and other Clays of E. England. 449 



Oleandridium vittattim (Brong.), Schimper (?). 



Pteropliyllum princeps, Oldham & Morris (? P. Morrisianum, Oldh., 



if these two are distinct species !). 

 PterophyUum Rajmahalense, Morris. 

 Pnlaiozamia cf. brevifolia, Braun. 

 Ptilophyllum, sp. 

 Walchia, sp. 



Finally, T should like to call your attention to the papers of my 

 friend H. von Jhering (now Director of the Museum Paulista in 

 Sao Paulo, Brazil) bearing upon the old Mesozoic relations of South 

 America with New Zealand aud Australia — " Die geographische 

 Verbeitung der Flussmuscheln " (Das Ausland, 1890, Nos. 48 

 and 49) and " Ueber die alten Beziehungen zwischen Neuseeland 

 und Sudamerika " (ibid., 1891, No. 18) — if you are not already 

 acquainted with them. 



Table (A) referred to above (see p. 448). 



Bajo de Velis. Sierra de Los Llanos, Sierra 



de la Rioja (Vilgo, Amanao). 



Neuropteridium validvm, Fstm. 



Glossopteris communis, Fstm. (?). 



retifera, Fstm. 



Gangamopteris cyclopteroides, Fstm. 



Phyllotheca. 

 Equisetites Morenianus, Kurtz. 



Lepidodendron Pedroanum, Szajn. 



Sternbergi, Brong. 



Noggerathiopsis Hislopi, Fstm. 

 ? Euryphjllum Whittianum, Fstm. (?). 

 Bhipidopsis ginglcoides, Schmalh. 



densinervis, Fstm. 



Cyclopitys dichotoma, Fstm. 



Academia Nacional Dr. F. Kurtz. 



de Ciencias. Cordoba (Rep. Argent.), 5 Aug. 1896. 



YI. — The Chalky and other Post-Tertiary Clays of Eastern 



England. 

 By Sir Henry H. Howokth, K.C.I.E., M.P., F.E.S., F.G.S. 



AMONG- the so-called Glacial beds, none fills a larger place in 

 geological literature than the Chalky Clay of Eastern England. 

 I prefer to call it the Chalky Clay, as Searles Wood named it, 

 rather than the Chalky Boulder-clay, because boulders in the true 

 sense of the word, such as characterize the genuine Boulder-clays of 

 North Britain, are infrequent in it. The term Chalky applied to 

 this clay depends on the fact that it is more or less crowded with 

 chalk rubble and chalk fragments of various sizes, and that it has 

 also incorporated in it a considerable quantity of chalk dust, whence 



DECADE IV. VOL. III. — NO. X. 29 



