UNGULATA. 37 



A horse's tooth from, the Red Crag of JBawdsey, Suffolk, was 

 noticed by Sir II. Owen (Quart. Journ. Geol. Soc., Vol. XII., 

 j). 223, fig. 12, 1856), and provisionally referred to E. plicidcns. 

 This specimen is in the British Museum (No. M. 2,704), and 

 Mr. K. Lydekker says (Cat. Foss. Mamm. Brit. Mus., part iii., 

 p. 90, 1886) it is not like E. Stenonis, and may possibly belong to 

 E. caballus ; provisionally it is kept with the latter species. 



There is another large upper equine molar from the Red Crag 

 of Felixstow in the York Museum, but it is too much broken 

 for specific determination. 



Numerous teeth, which cannot be distinguished from those of 

 E. caballus, have been obtained from the Forest-bed (Vert. 

 Forest Bed, p. 30), and similar teeth are common in Caves and 

 other Pleistocene and Prehistoric deposits in this country, on the 

 continent, and in Arctic America. 



EQUUS STENONIS, coccm. 

 PLATE V., FIG. 7, a, b. 



The occurrence of this species in the Forest-bed, and in the 

 Norwich Crag of Thorpe, has been noticed in the Survey Memoir 

 (Vert, Forest Bed, p. 35, 1882), a specimen from the latter locality 

 being in the Museum of Practical Geology (Plate V., figs. 7, , b,). 



The remains of Equus from the Norwich Crag in Mr. Fitch's 

 collection, noticed by Sir R. Owen (Brit. Foss. Mamm., p. 390, 

 1846), and referred to E.fossilis, are provisionally included in this 

 species. 



Equus Stenonis occurs in Upper Pliocene beds in Italy and in 

 France. 



Genus HIPPARION, Christol. 



HlPPAKlON GRACILE, KAUP. 



PLATE VI., FIGS. 8, , b; 9, , b. 



Sir R, Owen (Quart. Journ. Geol. Soc., Vol. XII., p. 223, 

 1856) was the first to recognise certain teeth from the Red Cn^ 

 of Suffolk as probably belonging to Hipparion ; and Prof. 

 Lankester (Ann. Mag. Nat. Hist., Ser. 3, Vol. XIV. p. 359, 

 1864, and Quart. Journ. Geol. Soc., Vol. XXVI., p. 510, 1870) 

 also noticed the occurrence of this genus in the Red Crag. 

 Messrs. R. and A. Bell (Geol. Assoc., Vol. II., p. 208, 1872) 

 include this form in their list of Middle or Red Crag Mammals 

 under the name Hippotherium gracile, and this appears to be 

 the earliest record of the species in Britain. Several teeth from 

 the Red Crag of Suffolk are included by Mr. Lydekker under 



