2 tJNOULATA. 



brain ia well developed 1 . The suborder Perissodactyla, as far as it 

 is at present known, is distinguished from the Artiodactyla by the 

 distal surface of the astragalus beiug truncate, instead of gin- 

 glymoid ; by the third digit being symmetrical in itself and larger 

 than either of the others, instead of the third and fourth being equal 

 in size and arranged symmetrically on either side of a line drawn 

 between them ; by the presence of a third trochanter to the femur ; 

 and by the non-articulation of the fibula with the calcaneum. As, 

 however, the limb-bones of some members of the Order are still 

 unknown, it ia possible that future discoveries may engender some 

 modifications of these distinctive characters 2 . 



Family TAPIRID^). 



The last three upper premolars are as complex as the true molars ; 

 the lower molars are simply bilophodont, and there is no third lobe 

 to m . 3. 



Genus TAPIRUS, Cuvier 3 . 



The writer follows Flower (Cat. Vert. Auim. Mus. Eoy. Coll. Surg. 

 part ii. Mammalia, p. 385 [1884]) in including Elasmognathus, Gill, 

 in this genus. 



Dentition: 1. 1, C. j, Pm. |, M. |. In the existing species there 

 are four digits in the manus and three in the pes. The first upper 

 premolar is preceded by a milk-tooth 4 . 



Tapirus arvernensis, Deveze and Bouillet 5 . 



This species is allied to T. indicus. 

 Hob. France and Italy 6 (? England). 



41141. Cast of the mandible, showing the complete cheek-dentition 

 of either side. .The original is from the Upper Pliocene of 

 Perrier, near Issoire (Puy-de-Dome), France. 



Purchased, 1865. 



' For other characters, see Marsh, op. cit. p. 175. 



a For other characters of the two suborders, see Flower, ' Encyclopaedia 

 Britannica,' 9th edit. TO!. IT. pp. 427, 429 (1883). 



3 Tab. Element, d. 1'Hist. Nat. p. 152 (1798). The genus also has the pre- 

 Linnean authority of Brisson. 



* Vide Proc. Zool. Soc. 1882, pp. 774-775. 



' ' Essai sur la Mont de Boulade* (1827), teste Gervais. 



* See Forsyth-Major, Quart. Journ. Q-eol. Soc. vol. ili. p. 2 (1885). 



