Mam. Classified tion . 7 



toed, being tetradactyle, but tbe digits are still unsymmetri- 

 cal {viz.y inter se), for digit iii. is the largest and longest. If 

 the species be horned, tbe born or borns are placed on tbe 

 median line of tbe bead. 



Tbis Order is divided into two 



Sub-orders : 



1. SOLID-UNGULA. 2. MuLT-UNGULA. 



1. Tbe Sub-order Solidungula is 



synonymous witb tbe single Family 

 of tbe Equidce, cbaracterised by baving only one digit (iii.) 

 completely developed in eacb foot ; and baving tbat digit 

 enclosed at its extremity in an entire boof. 



2. Tbe species included in tbe Sub-order Mult-ungula 

 bave all tbree toes to tbe bind feet, and also to tbe fore feet, 

 witb tbe exception above named (Tapiridae). Tbey are 



* divided into two Families : 

 1. Tbe Rhinoceridce bave, springing from tbe upper surface 

 of tbeir muzzle, a single or double born, composed of a solid 

 mass of borny fibres, supported on a bony protuberance of 

 tbe nose. Wben two borns. are present, tbey are placed one 

 bebind tbe otber, and tbe posterior born is mucb sborter tban 

 tbe anterior. 2. Tbe Tapiridce bave tbe nose produced into 

 a sbort proboscis. 



IX. Tbe species of tbe Order HYRACOTDEA were long 

 placed among tbe Hodentia, on account of tbeir size : Cuvier 

 placed tbem next to tbe UbinoceridaD : Wagner made a 

 separate group of tbe Pacbydermata for tbeir reception, wbicb 

 be termed " Lamn-ungula," for tbat tbe feet are furnisbed 

 witb flattened nails instead of boofs. Tbis Order 



contains but a single Family ^ 

 tbe Hyracidts.- 



X. Tbe AETIODACTYLA. Tbe species comprised in 

 tbis Order are cbaracterised by baving an even number of 

 boofed toes to eacb foot ; sometimes four, e.g. Hippopotamus, 



