S48 Mr. Parkinson on the Strata^ 



ral of these bodies, from the English chalk, have been figured in the 

 Org. Rem. vol. II. Pi. XIII. fig. 70 to 79. 



Another is supposed to belong to the genus Millepora. This is 

 generally brown, and is in the state of oxydized iron, as resulting 

 from the decomposition of pyrites. These fossils exist in the Wilt- 

 shire soft chalk. 



Lastly, Shark's teeth. These also occur frequently in the English 

 stratum. 



Messrs. Cuvier and Brongniart state, that there are many more 

 fossils in the chalk stratum of France than those which have been just 

 referred to. This is also the case with the fossils of the English chalk; 

 since the following may be enumerated as occurring in this stratum. 

 Rugous palates^ and, though rarely, the scales and vertebra ofjishes. 

 Three or four species of stella marina, A long saccular bivalve^ with 

 an uncommonly thin shell, of which so little has been hitherto saved, 

 as not to give a chance of gaining a knowledge of its general form, 

 or the structure of its hinge. A bivalvey which approaches to a 

 circular form, but is so thin as to afford but little hope of discovering 

 its genus. A bivalve, nearly circular, the margin turning upwards 

 so as to give it a patella or disk form, with numerous long processes 

 passing from the margin and external surface, and fixing it to other 

 bodies. A small pecten with sharp angulated ribs, not exceeding a 

 quarter of an inch in length. A bivalve, not an eighth of an 

 inch in length, finely striated longitudinally, bearing a bright polish, 

 and seemingly possessing its original light brown colour. Plates 

 of the tortoise echinite, and several remains apparently of other species 

 of this genus. 



When to these are added the remains of various echini, such as 

 conulites, cassidites, and spatangites, and the different spines of echini 

 which are found in this stratum; and when it is also considered 



