284 Reports and Proceedings — 



occurred ; a species of Albatross (Diomedea) represented by a right 

 tarso-metatarsus, and the associated proximal phalangeal bone of the 

 fourth digit. 



4. "The Pleistocene Succession in the Trent Basin." By E. M. 

 Deeley, Esq., F.G.S. 



The author, after referring to the previous publications on the subject, 

 proceeded to notice the leading characters of the greatly developed 

 Pleistocene deposits in the area drained by the Trent river and its 

 tributaries. He proposed to classify the beds in question under 

 three divisions, comprising the following stages. The beds of the 

 lowest division were distinguished from those of the middle and upper 

 by the absence of Cretaceous rock-debris. 



! Early Pennine Boulder- clay. 

 Quartzose Sand. 

 Middle Pennine Boulder-clay. 

 ( Melton Sand. 

 Middle Pleistocene. < Great Chalky Boulder-clay. 



. ( Chalky Sand and Gravel. 

 tvt -n f Interrfacial Paver- alluvium. 



Newer Pleistocene, { Later G Pennine Boulder-clay. 



Each of the stages was then described separately, with details of 

 exposures and sections throughout the area. 



The Early and Middle Pennine Boulder-clays, which closely resem- 

 bled each other, were regarded as composed of materials derived almost 

 entirely from the Derbyshire mountains, but with a slight admixture, 

 to the westward, of erratics derived from Scotland and Cumberland. 

 The latter were probably brought from those counties by an ice-stream, 

 the main materials of the deposits having been transported from the 

 Pennine chain by glaciers, and deposited in the partially submerged 

 valley of the Trent. The intermediate quartzose sand was deposited 

 in the sea during an intercalated warmer age of considerable sub- 

 mergence. 



The Middle Pleistocene deposits, distinguished from the earlier by 

 containing large quantities of chalk and flints derived from the north- 

 east, were apparently formed at a time when the level of the Trent- 

 valley area was lower than that of the Cretaceous tracts in Lincoln- 

 shire and Yorkshire. The Great Chalky Boulder-clay was chiefly 

 a ground-moraine formed beneath an ice-sheet on land, but in places 

 presented signs of aqueous origin. The Melton sand, below, in which 

 Cretaceous detritus first appeared in abundance, consisted of stratified 

 sands with occasional beds of gravel or loam, and indicated a less 

 extreme temperature. In West Staffordshire the gravels and sands 

 probably represented the entire Middle Pleistocene deposits, no great 

 Chalky Boulder-clay being found, and in this area fragments of marine 

 mollusca were of frequent occurrence. The Chalky Gravel was also 

 a marine deposit, and, like the Melton Sand, was probably formed when 

 the temperature was rather milder than it was during the deposition of 

 the Great Chalky Boulder-clay. 



In the Newer Pleistocene epoch re-elevation of the Trent valley and 

 of the Pennine chain appeared to have again produced a change in the 

 direction from which the materials of the deposits were derived. The 



