1866.] GODWIN -AUSTEN BELGIAN TEETIAEIES. 229 



I. Inteoduction. 



The following notes relating to the Kainozoic or Tertiary* formations 

 of Belgium were put together in the course of an interesting excursion 

 through that country in the spring of 1865, in company with Mr. 

 Hamilton, Mr. Prestwich, Captain D. Galton, Mr. W. W. Smyth, 

 Mr. Busk, and Mr. Gwyn Jeffreys. Our route was from Harwich to 

 Antwerp, Louvain, Hasselt, Maestricht, Liege (whence to Engis and 

 Engihoul) , Namur. Some of the party went into Brussels to see the 

 collection in the Museum there ; some to the Grotte de Han ; in 

 company with M. van Beneden I had the advantage of seeing, 

 under the guidance of M. Malaise, the lower Palaeozoic and fossi- 

 liferous rocks of Gembloux, which he considers to be of the age of 

 the Lower Silurian series of Sir. E. Murchison. 



Prom Dinant, where we were joined by the late Mr. H. Christy, 

 we all visited, under the escort of MM. van Beneden^ Dupont, and 

 other Belgian geologists and antiquaries, the caves of Purfooz on the 

 Lesse. An excursion in the neighbourhood of Mons, and a visit to 

 the coast at Sangatte, near Calais, completed the trip. 



Some of our party had been in Belgium before, even repeatedly. 

 The points in its geology which on this occasion chiefly interested 

 us were the Crag-formation of Antwerp and elsewhere, the Bolderien 

 beds of M. Dumont, and the caves and recent researches at Purfooz. 



To what extent the several members of our party may concur in 

 the views here recorded is a point on which I will not venture to 

 speculate ; they are offered as my own exclusively ; but I feel 

 bound to acknowledge the great advantage I derived from visiting 

 the district in company with so many experienced observers as 

 naturalists and geologists ; and we can aU testify to the kind inte- 

 rest and assistance of the Belgian geologists, as also to that of the 

 military authorities at Antwerp, for which last we were indebted to 

 the exertions of Mr. J. Jones. 



The cave-researches of Purfooz are under the superintendence of 

 MM. van Beneden and Dupont ; for this reason it would not be 

 fitting that any comments should be made with respect to the views 

 which were freely communicated to us, until such time as the final 

 official report shall have been published. The question relating to 

 some portion of the in-filling is so closely connected with that very 

 complicated period to which the Loss, the Sables de Campine, and the 

 Cailloux Ardennais belong, that a few short references are necessary. 



II. Older Kainozoic or Crag Beds oe Antwerp. 



1. General MemarJcs. — By permission of the Belgian war depart- 

 ment, we were enabled to examine at leisure the deep sections 

 connected with the extensive military works in course of execution 

 around Antwerp ; in addition we received the cordial assistance of 

 Captain Cocheteux and other Engineer officers. 



The monograph of Mr. Searles Wood f had long since informed 



* In this paper the author restricts the application of the terms Kainozoic and 

 Tertiary to deposits of the age of the Faluns and of more recent date. — Edit. 

 t Palseontographical Soc. 1848-1850. 



