PLATE XI. 
1. Hippotherium antilopinum. Falc. and Caut. ; part of left maxilla, showing pre- 
molars 3 and 4 (pm. 3, pm. 4), and true molars 1 and 2 (m. 1 and m. 2), from a 
specimen collected by Mr. Theobald in the Siwaliks of Niki, in the Punjab (No. C. 
139, Ind. Mus.). The teeth are in an early stage of wear, hut later than in 
figure 3. 
2. Hippotherium antilopinum. Pale, and Caut; the milk-molar dentition of the 
left side, of a colt about one year old ; from a palate specimen collected by Mr. 
Theobald in the Siwaliks of Niki. The specimen shows the four milk-molars 
(mm. 1 to mm. 4), and the unworn germ of the first true molar (m. 1), (No. C. 138, 
Ind. Mus.) . The teeth are in an early stage of wear. 
3. Hippotherium theobaldi. Lydekker. Fragment of the left side of the maxilla showing 
the two last premolars (pm. 3, pm. 4), and the two first true molars. Collected by 
Mr. Theobald in the Siwaliks of Niki (No. C. 151, Ind. Mus). The teeth are in 
a very early stage of wear. 
4. Hippotherium theobaldi. Lydekker. Fragment of the left maxilla of a colt, about 
one year old, showing the three last milk-molars (mm. 2, mm. 3, mm. 4), and the 
broken base of the first tooth of the same series (mm. 1). Collected by Mr. Theobald 
in the Siwaliks of Kaipar, in the Punjab (No. C. 153, Ind. Mus.). The teeth have 
only just come into wear. 
All the specimens are represented of the natural size. 
