GEOLOGICAL AGE OF MAST. AKVEENENSIS. 



63 



are two upper and three lower molars of a species of Hippo- 

 therium from the Eed Crag pits at Sutton. They bear a close 

 resemblance to the Miocene H. #rac^e,Kaup, from Eppelsheim. 

 The same collection contains several molars, upper and lower, 

 of the genus Rhinoceros, one of which (an upper antepenulti- 

 mate milk molar) agrees, in most of the characters, with an 

 original specimen of a corresponding tooth of Rhinoceros 

 Schleiermacheri from Eppelsheim, with which it was compared. 

 Mr. Whincopp also possesses an upper maxillary bone con- 

 taining a series of the molar teeth of Hyracotherium leporinum; 

 also detached molars apparently of the smaller species, Hyrac. 

 cuniculus, both said to have been procured from the Eed Crag 

 at Felixstow. Besides these, Mr. Whincopp possesses : 1st, 

 several perfect Cetacean teeth, resembling those referred to 

 Hoplocetus by Gervais ; 2ndly, two remarkable molar teeth of 

 a form which has not hitherto been described as a British 

 fossil; and 3rdly, numerous remains of Eed Crag Bel- 

 phinidce. 



In the rich collection of Edward Acton, Esq., of Grundis- 

 burgh, there are specimens referable to both species of 

 Hyracotherium, and reputed to be from Eed Crag localities in 

 Suffolk, besides molars of Tapirus and Rhinoceros. Mr. 

 Acton also possesses a singularly perfect antepenultimate 

 true molar from the lower jaw of M. (Tetralophodon) Arver- 

 nensis, showing the peculiar characters of the species strongly 

 marked. 1 



In neither of these collections did I observe any specimen 

 referable to M. (Tetraloph.) longirostris of Eppelsheim, nor to 

 the peculiar Mammalian genera of the Upper Miocene period, 

 enumerated in a preceding paragraph as being usually 

 associated with that species (p. 59). It is manifest that the 

 Hyracotherian remains must have been derived from broken- 

 up Eocene deposits ; and the teeth of Hippotherium indicate 

 a similar inference of Miocene remains being mixed up with 

 Pliocene forms in the reconstructed materials of the Red Crag 

 deposit.— H.P., Oct. 20th, 1857.] 



Conclusion. — On a review of the various facts and con- 

 siderations discussed in the preceding pages, it seems clear 

 that the Mammalian fauna of the Eluvio-marine Crag- is of a 

 Pliocene age. The undoubted association of M. (Tetraloph.) 

 Arvernensis and of E. (Loxodon) meridionalis in this deposit 

 admits of no other inference. The mixed contents of the 

 Eed Crag, including Mammalian remains of different strata 



1 In Mr. Whineopp's collection there 

 is a very beautiful specimen of an intact 

 germ of an antepenultimate upper milk 



molar, from the Eed Crag, closely re- 

 sembling the specimens figured by 

 Croizet and Jobert. 



