FALCONER — MASTODON AND ELEPHANT. 303 



inches. 



Length 2-6 



"Width of crown at first plate 1-15 



„ „ behind 1*4 



Height of crown at fifth ridge 1"55 



The corresponding tooth of jE'.(£'({eZ(3^9 A.) antiquusandoi E.jJrimigemus 

 yields normally eight transverse plates. The precise origin of the 

 specimen is not recorded; but it is supposed to have belonged to 

 Mr. Samuel Woodward, and to have been derived from the Norfolk 

 coast. 



The specimen, fig. 2 a:ad 2 a, is another example of the same 

 tooth, a penultimate upper milk-molar, right side, discovered in the 

 Norwich Crag at Easton, Suffolk, by Captain Alexander. It pre- 

 sents six ridges, well advanced in wear. 

 The dimensions are — • 



inches. 



Length 2-4 



Width in front 1-0 



„ behind 1*6 



Figs. 3 and 3 a represent another well-worn penultimate milk- 

 molar, probably of the lower (?) jaw, right side. It is of a larger 

 size than the others, but shows the same number of plates, namely 

 six, with talons. It is very broad in the crown relatively to the 

 length. The disks of the ridges are very wide, like the Italian 

 specimens. This molar belonged to the collection of Mr. Samuel 

 Woodward; it is now in the Norwich Museum. It is heavy and 

 dark-coloured, and bears fresh patches of marine incrustation*, and 

 may have come from the " Oyster-bed" of Mundesley and Happis- 

 bnrgh. 



Figs. 4 and 4 a represent the last milk-molar of the lower jaw, 

 left side. The crown is worn, and cojoiprises eight ridges. The 

 ends and sides of the crown are partly injured. In mineral con- 

 dition it is black and heavy, but free from patches of marine in- 

 crustation. It is supposed by Mr. Samuel Woodward to have been 

 procured from the coast (Norwich Museum). 

 The dimensions are — 



inches. 



Length of crown 3-9 



Width of crown in front 1*4 



„ „ at sixth ridge 2-0 



Height of crown at seventh sidge 2"1 



* In this and the following descriptions the term "marine incrustation" 

 means recent patches of existing Polyzoa, two of which have been determined 

 by Mr. Busk to be species of Lepralia, or of other allied forms. Their pre- 

 sence determines the fossils to have been dredged out of the modern sea-bottom. 

 This is a point of some importance in the present case, since the Mammahan 

 contents of the "clay-beds" have been so heedlessly regarded in tlie geological 

 descriptions of the Norfolk coast, that there is hardly on record a shigle instance 

 of a Mammal remain precisely referred to any one distinct stratum above the 

 "Elephant-bed" of Grunn, although the fossils, in many instances, bear palpa- 

 ble indications of tlie matrix m which they were imbedded. 



VOL. XXI. PAKT I. Y 



