384 SOLIPEDIA. 
Paviland; by Mr. Lyell* in the tertiary deposits on 
the Norfolk coast; by Col. Hamilton Smith+ in the 
bone-caves near Torquay; and by Mr. Morris} in the 
Mammaliferous deposits in the valley of the Thames, as 
at Wickham, Ilford, Erith, Grays, and Kingsland. Cu- 
vier records many instances of the like association of a 
Horse with the undoubted extinct species of Mammals 
in the corresponding formations on the continent. 
No critical anatomical comparison appears hitherto to 
have been instituted with regard to the relations of these 
British equine fossils with the existing species. That 
the fossils vary in size amongst themselves has been more 
than once noticed; and Dr. Buckland makes a remark § 
expressive of his suspicion that they belonged to more 
than one species. 
The largest-sized fossil Hquus from British strata is indi- 
cated by molar teeth, obtained by Mr. Lyell from a bed 
of laminated blue clay, with pyrites, eight feet thick, 
overlying the Norwich crag at Cromer, where they are 
associated with remains of the Mammoth, Hippopotamus, 
Rhinoceros, Bos, Cervus, and Trogontherium. The antero- 
posterior diameter of one of these teeth, the second in the 
lower jaw, was one inch four-tenths, equalling that of the 
largest dray-horse of the present day: other correspond- 
ing fossil teeth of Hqguus have measured in the same dia- 
meter, some one inch two-tenths, and some one inch. The 
intermediate size, which equals that of the teeth of a 
horse of between fourteen and fifteen hands high, is the 
* ©Phil. Mag.’ vol. xvi. (1840.) pp. 349, 362. 
+ *Naturalist’s Library,’ Horses, p. 63. 
+ * Mag. of Nat. History,’ 1838, p. 539. 
§ Loc. cit. p. 75, with respect to the equine remains discovered in the Oreston 
caverns :—* Horses about twelve, of different ages and sizes, as if from more than 
one species.” 
