and Toss'il Remains vear hondim. SS5 



but having from thirty-four to thirty-six ribs, with no depressed 

 line down their middle, nor vestiges of spines ; Mactra solida^ Venus 

 exoleta^ Venus scotica ? Venericardia senilis^ Lam. Area glycemerisy 

 Area nueleus. 



Besides these remains of marine animals, the fossil hollow tubercles, 

 having lost the spines, of the thornback are here found ; also frag- 

 ments of the fossil palate^ (Scopula littoralis of Lhwydd) and 

 fofcsil remains of sponge and alcyonia, particularly a very fair speci- 

 men oi xhQ reticulated alcyonium. Org. Rem. vol. II. pi. IX. fig. 9. 



In this bed, among the gravel and the shells, are frequently 

 found fragments oi fossil bone, which possess some striking pecu- 

 liarities. They are seldom more than half an inch in thickness, 

 two inches in width, and twelve in length ; always having this flat 

 form, and generally marked with small dents or depressions. Their 

 colour, which is brown, light or dark, and sometimes inclining to a 

 greenish tint, is evidently derived from an impregnation with iron. 

 From this impregnation they have also received a great increase 

 of weight and solidity ; from having been rolled they have acquired 

 a considerable polish ; and on being struck by any hard body they 

 give a shrill ringing sound. These fragments, washed out of the 

 stratum in which they had been imbedded, are found on the beach 

 at Walton, but occur in much greater quantity at Harwich. 



Of the flat rounded pieces described above, no conjecture can be 

 formed as to the particular bone or particular animal to w^hlch they 

 belonged. But within these few years an Essex gentleman found, 

 on the beach at Harwich, a tooth which was supposed to have be- 

 longed to the inammoth. This fossil was kindly obtained at my 

 request, for the purpose of being exhibited to the members of the 

 Geological Society, by my late friend Dr. Menish ; and certainly 

 it appeared to be part of a tooth of that animal. It had been 



