298 Proceedings of the Royal Society of Edinburgh. [Sess. 
Fig. 15. Fig. 16. 
Fig. 15. — Upper view of skull of a slender-limbed horse of the “ plateau ” type, about 12*2 hands 
high, from the Roman fort of Newstead. Length from occipital crest to alveolar point 
(i.e. point between central incisors), 494 mm. ; length from line connecting supra-orbital 
foramina to alveolar point, 338 mm. ; frontal (greatest) width, 185 mm. Owing to face being 
long and narrow, the frontal index (185 x 100-^338) is 54, as in high-caste Arabs. 
Fig. 16. — Upper view of skull of coarse-limbed pony of the “forest” (Solutre) type, from Newstead. 
Owing to the great width of the face the frontal index is 61 ; in a broad-browed Shetland pony 
with a short dished face the frontal index may be 63 ; but in the very long-faced wild horse 
of Mongolia it may be only 50. 
