DISCOVERED AT WOODBRIDGE. 451 



It is unnecessary to offer any comments on the interest of 

 the additions now made to the extinct Fauna of this island, 

 by the discovery of Quadrumana and marsupials in the Lon- 

 don clay. These additions probably constitute only the 

 commencement of a series of discoveries, which will be 

 brought to light in the same quarter ; as Mr. Colchester, who 

 holds the quarry, has made arrangements for the careful ex- 

 amination of all the sand which shall be subsequently remov- 

 ed. The connection of this enquiry with the subject of M. 

 d'Orbigny's papers in the Journal of the French Academy, 

 and the Bulletin of the Geological Society, should not be 

 overlooked. It seems as though the phenomena in the pre- 

 sent case would admit an inference very similar to that which 

 he drew from an examination of the beds above the chalk in 

 the neighbourhood of Meudon, and respecting which he re- 

 marks, — " Qu'il existe, a la partie inferieure de Targile plas- 

 tique, des caracteres nouveaux demontrant surtout que divers 

 genres de mammiferes vivaient a Tepoque ou cet etage s'est 

 forme." 



H 



a & d) Teeth ofLamna agreeing in form with species abundant in the London clay & red crag. 

 b) Tooth probably of the same genus, but of an undescribed species, provided with quadrate 

 lateral denticles. 

 Tooth of Lamna with two pairs of denticles. 



A tooth, of which the form probably depends upon its situation having been near the ter- 

 mination of the series. 



I selected a few of the sharks' teeth found in this deposit, 

 from several hundred in the possession of Mr. Colchester, for 

 the purpose of illustration. I believe all yet discovered may 

 be referred to the genus Lamna, and to species which occur 

 in both the crag and London clay, so that at present the iden- 

 tification of the bed from the evidence furnished by organ- 

 ic remains, must be looked upon as a desideratum. The teeth 

 of the genus Otodus, though not uncommon in the London 



