140 FIELD GEOLOGY. 



We may begin by turning our attention to the flint - 

 bands which have been remarked upon before, and by 

 examining the nodules in place, and the heaps of those 

 which we see by their white exterior to have been in 

 place, we soon collect several Echinoderms : Ananchy- 

 tes, Micraster, and the spines of Cidaris, together with 

 a few specimens of Inoceramus and Spondylus, all im- 

 bedded in the flint. These must be trimmed as well as 

 possible, although flint is very intractable, and just as 

 likely to split through the fossil as along the plane in- 

 tended. Flint is perhaps best manipulated by holding 

 the lump in the left hand, and chipping it by well-aimed 

 blows of the hammer, each one directed away from the 

 enclosed fossil. 



The flints having been well looked over, we turn to- 

 the beds of chalk themselves, and when our eyes become 

 used to its appearance we soon extract, by means of 

 hammer and chisel, specimens of the same species just 

 found, with the addition, perhaps, of some smaller 

 fossils, such as Magas pumilus, Terebratula carnea, 

 Ehynconella octoplicata, Crinoid stems, and plates of 

 Marsupites Milleri. 



We examine also the tests of the large and smooth 

 Echinoderms, such as Ananchytes and Galerites, which 

 are often the resting-places of Crania, Plicatula, and the 

 minute Thecidium Wetherellii, as well as various species 

 of elegant Polyzoa and Serpulce. A chalk-pit is very 

 frequently a lime-kiln also, and the men at work almost 

 invariably preserve some of the more striking fossils 

 they meet with in quarrying the rock ; these, therefore,, 

 may generally be obtained " for a consideration." 



(e and /.) In the loam at the brickyard few fossils are 

 likely to be found, except perhaps some fragments of 



