New genus of the order Rodentia. 133 



«egre distinguendi, utrinque tres, superiores subeequales, infen= 

 ores inaequales, posteriores minores. Rostrum breve, obtusius- 

 culum ; rhinarium latiusculum cartilagineum ; nares lateralitei 

 pandentes. Oculi parvi. Auriculae parvae, sub vellere latentes, 

 Cauda brevis, teres, pilosa. MammcB apertae, ventrales. 

 Pedes distinct! ambulatorii, pentadactyli ; digitis externis bre- 

 vioribus ; hallux brevissimus ; ungues quinque (excepta hallu- 

 cari) falculares. 



PSAMMOMYS PINETORUM, L. C. 



Hair short, shinuig dark cinereous, above tipt with brown, 

 beneath with very pale ash. Head rather large and blunt : 

 eyes very small ; whiskers short ; ears very short, naked, almost 

 entirely concealed in the fur ; neck thick and short ; legs very 

 short ; feet hairy, ash-coloured, with a tinge of flesh colour ; 

 thumb very short, furnished with a rather obtuse and straight 

 nail ; the rest of the nails long, sharp, and hooked. Tail short, 

 round, hairy. 



Length three inches and seven-tenths ; tail three-quarters oJ 

 an inch. 



Plate n. (a) upper jaw, (b) lower. 



