1866.] WILSON ECUADOE. 567 



5. On some Flint Implements lately found in the Valley of tlie 

 Little Ouse Eivek, near Thetford. By J. W. Plower, Esq., 

 E.G.S. 



(The publication of this paper is unavoidably deferred.) 

 [Abstract.] 



The sands and flint-gravel on the right bank of the river Ouse at 

 Thetford form a terrace 8 to 10 yards above the river, and about 

 40 yards distant from it. At a spot called Eed Hill a large number 

 of flint implements have lately been obtained from this gravel, at 

 from 12 to 15 feet below the surface, and within a foot or less of the 

 chalk on which the gravel rests ; and some were found in the same 

 gravel filling pot-holes in the chalk. 



The author pointed out the exact correspondence, as regards geo- 

 logical position and relations, between the Thetford gravels and the 

 flint-implement-bearing beds of Amiens, AbbeviUe, Fisherton, Ick- 

 lingham, Hoxne, &c. He further noticed the close resemblance 

 which these implements and some others discovered in England 

 bear to those of the valley of the Somme ; and concluded by ex- 

 pressing his dissent from Mr. Prestwich's conclusions, and stating 

 his own views on their mode of accumulation, remarking that, in 

 his opinion, these implements were manufactured prior to the sever- 

 ance of this island from the continent. 



6. Geological Notes of the Pacific Coast of Ecuador, and on some 

 Evidences of the Antiquity of Man in that Region. By J. S, 

 Wilson, Esq. 



(Communicated by Sir E. I. Murchison, Bart., K.C.B., F.E.S., F.a.S.) 



[Abstract.] 



The western slope of the Cordilleras is occupied with projected 

 volcanic matter, presenting an irregular aggregation of boulders, 

 gravel, sand, fine earthy matter, or ashes, and pumice. The boulders 

 are of various sizes, and consist principally of the more ancient and 

 the hardest plutonic rocks. Small angular fragments of granite are 

 occasionally met with many miles from where that rock is found at 

 the surface, and where there exists no evidence of their having been 

 transported by water. 



In some of the older strata of this volcanic rock, extending along 

 the coast and some distance inland, occur cavities, that have been 

 once occupied by the roots of trees, in their original place alongside 

 prostrate stems, which indicate that there were periods of repose of 

 the volcanic agencies by which the materials constituting this rock 

 were distributed. Traces of forest-vegetation in the volcanic mate- 

 rial were found on the coast and in some of the older beds of that 

 deposit, commonly below high-water mark, and also at various 

 points up the river Esmeraldas, and at all altitudes up to the foot 



VOL. XXII. PART I. 2 Q 



