3i6 Lloyd's natural history. 



the most peculiar is a species named C. vertico7'ms, character- 

 ised by its short and thick antlers, in which the cylindrical 

 " brow "-tine curves downwards over the forehead, while above 

 it are two oval tines, and superiorly the beam becomes flattened 

 and expanded into a crown of two points. The Pigs were 

 represented by two extinct species, one of which was nearly 

 allied to, if not identical with, the gigantic Stis erymanthiiis 

 from the Pliocene deposits of Attica; while the smaller one 

 has been identified with another continental species known as 

 S. palceochcerus. 



Among the Odd-toed Ungulates, true Horses seem very 

 rare, although Steno's Horse, alluded to above as char- 

 acteristic of the Forest-bed, has been recorded from the 

 Norwich Crag. Three-toed Horses of the genus Hippario7i 

 were, however, common in the Red Crag ; their upper 

 molar teeth, as shown in the accompanying figure, being 



Fig. 3. Left upper molar tooth of Three-toed Horse {Hipparion), 



always distinguishable at a glance by the isolation of the 

 antero-internal from the enamel-folds of the centre of the 

 crown. The Red Crag Rhinoceroses are quite distinct from 

 those of the overlying beds, one being identical with the Horn- 

 less Rhinoceros iticisivus of the continental Pliocene, while it is 

 possible that a second may be the same as a Two-horned form 

 {R. schleiermacheri\ which is apparently nearly allied to the 

 living Sumatran species, having, like the Hornless forms, large 

 tusks in the lower jaw. The occurrence of a Tapir in the Red 



