618 



MR. S. II. WARREN 0> T THE 



["vol. lxxix. 



minutely granular, and, under a lens, is seen to be covered by 

 minute, but sharply defined, vertical ribbings, with granules at 

 intervals. In the more massive species the surface of the enamel 

 is generally smoother, and the ribbings broader but less sharply 

 defined. 



Other remains. — I have obtained several teeth of the pike 

 and numerous minor remains, such as some scales of a perch-like 

 fish, and a fragment of the carapace of a crustacean (probably 

 crayfish). 



Clacton Mammalia. 



E = rare ; C = common. 



Owen, 'Dawkins. Survey, 

 1846. ' 1869. ' 1880. 



Arvicola amphibia Desm 



Bos bison 



Bos (minor Owen) ? 



Bos primigenius Bojan 



Capra sp 



Castor sp 



Cervus dama Linn 



Cervus browni Dawkins 



Cervus elaphus Linn 



Cervus giganteus (=Megaceros) ... 



Elephas antiquus Falconer 



Equus caballus Linn 



Fells leo var. spelma Gold 



H ippopotamus 



Hyiena spelsea Gold 



Microtus agrestoides Hinton ?...:.. 

 Rhinoceros megarhiniis de Christ. 

 Rhinoceros Tiemitsechus Falconer 

 Ursus sp 



+ 



+ 



+ 



+ 



}' : 



+ 



+ 



... 



1923. 



+ 

 + 



p 





v.E. 



+ 



T.C. 





E. 





v.E. 



* 





+ 



v.C. 



v.C. 

 E. 



v.E. 

 C. 



C. 



Conclusion. 



If we sum up the evidences of dating, the stratigraphy points to 

 some part of the 50-foot, or Taplow, Terrace stage, apparently not 

 the earliest, and certainly not the latest, part of that stage. The 

 cutting of the deep channel shows that it was later than the period 

 of rejuvenation ; while the silting-np may (but not necessarily 

 must) have been associated with the first arrest of erosion, which 

 subsequently culminated in submergence up to at least 30 feet O.D., 

 or more. The mammalia might be either Chellean or Early 

 Acheulian, but could not be regarded as Late Acheulian. The 

 mollusca indicate a narrower correlation : namely, later than the 

 JT/jrpojyotamus beds of Little Thurrock, and earlier than the brick- 

 earths of Crayford with their 'mixed' fauna and their Mousterian, 

 or more probably Early Mousterian, industry. The plants indicate 



