276 Mr. H. Seeley on the Fossils of the Hunstanton Red Rock. 



XXXIII. — On the Fossils of the Hunstanton Red Rock. 

 By Harry Seeley, F.G.S.,Woodvvardian Museum, Cambridge*. 



The evidence of a rock's age derived from fossils can never be 

 quite conclusive, and never rank as equal in value with sectional 

 evidence; for the testimony of different species is of unequal 

 importance. And so the opinion formed from a mere glance at 

 the fades of a fauna may be of more value than elaborate tables 

 of the range of species. In this way the lied Rock fossils may 

 be said to have an Upper-Greensand character, with some resem- 

 blance to Gault ; but the same thing would be remarked, only 

 on the latter clause more emphatically, of the Cambridge Green- 

 sand. 



The fossils in the annexed list are all from Hunstanton, and 

 my own collecting : they are to be seen in the Woodwardian 

 Museum. 



The rock is divided into three well-marked layers, nearly 

 equal in thickness. In descending order, they are numbered 

 1, 2, 3; and in the fifth column of the table a first attempt is 

 made to refer the species to their places in the section. 



* Communicated by the author, having been read before the Cambridge 

 Philosophical Society. 



