PLATE XXI. 



Figs. 1 and 1 a. Crown and profile views of a left upper first true molar of E. 

 primigenius, in the possession of Mr. A. Savin, from the Forest Bed, Ov-erstrand, near 

 Cromer. (Fig. 1 natural size, fig. 1 a f natural size.) 



Figs. 2, 2 a, and 2 b. External, superior, and inferior aspects of a left internal 

 cuneiforme of E. meridionalis, No. 188, of the Gunn Collection, from the Norfolk coast. 

 (About natural size.) 



Fig. 3. Scaphoidal and metacarpal articular surfaces of No. 23,119, British Museum, 

 a left trapezoid of E. primigenius, from Maidstone, Kent. (^ natural size.) 



Fig. 4. Scaphoidal and metacarpal articular surfaces of No. 36,609, British Museum, 

 a left trapezoid of E. antiquus, from Grays, Essex. {\ natural size.) 



