ARKIV rÖR ZOOLOGI. BAND 6. N:0 15. 



The palatal folds in front of the premolars are obliquely 

 arranged, but each fold is straight and large. From the 

 frontmargin of the molar series and backwards the palatal 

 folds decrease in size and become gradually more and more 

 arched at the same time as their edge to some degree be- 

 comes divided into papillae. This is especially the case with 

 the hindmost. This arrangement and shape of the palatal 

 rugcB agrees well with the corresponding features in the Horse.^ 



There is, however, a 

 conspicuous difference 

 b etwe en the aspeet of 

 the palate of the Indian 

 Tapir and the Horse 

 as the jjapilla incisiva 

 is absent in the latter, 

 but well developed in 

 the former as already 

 mentioned and proved 

 by the accompanying 

 figure (fig. 1). The ab- 

 sence of this papilla 

 is thus no general fea- 

 ture among the Peris- 

 sodactyla and hardly 

 even in the family Equi- 

 dce, although Ellen- 

 BERGER and Baum- 

 speak about »die bei 

 den Einhufern fehlen- 

 de» Papilla incisiva. 

 In a foetiis of Equus hurclielli the present author has found 

 a very large papilla incisiva. The new born young of an 

 Ass is also provided with such a papilla as proved by Ret- 

 zius (1. c. p 133, Pl. XXXVII fig 2.), but it might disappear 

 with age in the members of the horse-family unlike in the 

 Tapir. 



In describing the anatomy of a Sumatran Rhinoceros 

 Garrod does not mention any papilla incisiva and the num- 



Fig.l. Palate of a yoiiiii; 



i apir showing rugie palatinse. 



^ See for instance G. Retzius: Bio!.! Untersuchungen, Neue Folge, 

 XXIII p. 133 Pl. XXXVII fig. 1. 



^ Handb. d. vergl. Anat. d. Haustiere. ll:te Auflage. Berlin 1906. 



