496 MAMMALIA. 



Genus 16. — Bathyergus. — Cavier. 

 Generic Character. — Incisors \, no canines, grinders ^^ or 

 \^ ; total 20 or 16. Incisory teeth very long, large, and square ; 

 grinders slightly tuberculous, indented on the edges ; body thick 

 and cylindrical ; head thick ; muzzle truncated ; eyes small ; no 

 exte rnal ears ; feet short, with five toes on each ; nails formed 

 for digging ; tail very short. 



Bathyergus maritimus — Coast Bathyergus. — Plate XVI*. 

 fiff. 2. — Fur whitish-gray ; tail flat, covered with rough hairs ; 

 body above a foot long ; tail about three inches. Inhabits the 

 Cape of Good Hope. 



Genus 17. — Pedetes. — Desmarcst. — 



Generic Character. — Incisory teeth ^, no canines, grinders *7j . 

 total 20. Lower incisory teeth cut obliquely, and not pointed ; 

 grinders formed of two elliptical parts, united at their external 

 extremity, and separated above by a deep furrow ; head short, 

 large, and flat; muzzle obtuse, terminated by small nostrils set 

 at right angles ; ears long, narrow, and pointed ; eyes large ; no 

 cheek pouches ; whiskers large ; fore feet with four toes, hav- 

 ing long, narrow, digging nails ; hind feet with four toes, tlje 

 external ones very small, the intermediate of the other three 

 much the longest, the rest being equal, all furnished with thick 

 strong nails ; tail long and thick. The females have an abdo- 

 minal pouch, which does not inclose the teats. 



Pedetes Capensis. — The Cape Pedetes. — Plate XVI*. fig. 

 3. — Fur bright, fulvous, varied with black above, white under- 

 neath ; with a line of the same colour in the folds of the arms ; 

 legs brown ; tail thin^ reddish above, near the insertion, gray be- 

 low, and black at the end. Inhabits the Cape of Good Hope. 



Genus 18. — Arctomys. — Geoffroy. 



Generic Character. — Incisory teeth ;j, no canines, grinders 

 J-^', total 22. Incisors very strong ; anterior surface rounded j 

 upper surface of the grinders furnished with ridges and tuber. 

 des ; head large ; eyes large ; ears short ; body thick and heavy ; 

 paws strong ; fore feet with four toes, and a rudimentary 

 thumb ; the hind feet with five toes ; nails strong and compress- 

 ed", tail generally short. 



