134 ^^' Trimmer's Account of some organic Remains 



in xht second stratum, snail shells and the shells of river fish. 

 In the fourth stratum were found teeth and bones of both the 

 African and Avsiatic elephant, teeth of the hippopotamus, bones, 

 horns, and teeth of the ox. 



A tusk of an elephant measured, as it lay on the ground, 

 nine feet three inches, but in attempting to remove it, it broke 

 into small pieces. When this stratum dips into the clay, and 

 becomes a mixed mass, as before stated, it is seldom v^^ithout 

 the remains of animals. In the fifth stratum, namely the blue 

 clay, the extraneous fossils are entirely marine, with the ex- 

 ception of some specimens of fruit and pieces of petrified wood, 

 the latter of which may be considered as marine, because when 

 of sufficient size, they are always penetrated by teredines. 

 The other fossils from this stratum are nautili, oysters, pinna? 

 marinas, crabs, teeth and bones of fish, and a great variety of 

 small marine shells; this stratum has been penetrated hitherto 

 in this field only to the depth of thirty feet, throughout which 

 the specimens found were dispersed, without any regularity. 



The second field is about one mile to the westward of the 

 former, one mile north of the Thames, and a quarter of a 

 mile to the eastward of the river Brent ; its height above the 

 Thames, at low water, is about forty feet. The strata are, 

 first, sandy loam, eight or nine feet, in the lowest three feet 

 of which it is slightly calcareous. Second, sand, becoming 

 coarser towards the lowest part, and ending in sandy gravel 

 from three to eight feet. Third, sandy loam highly calca- 

 reous, having its upper surface nearly level, but gradually 

 increasing in thickness from a feather edge to nine feet. 

 Below this are two strata of gravel and clay, as in the other 

 field, but as these strata have been only occasionally penc* 



