2/6 MAMMALIA. GL1RES. Jerboa. 



Inhabits the fandy deferts, between the Ural and Volga, near the Cafpian This animal forms 



burrows, with three entrances, about a yard in depth ; and feeds chiefly on the feeds of the Pterococ- 

 ci and Aftragali. It is fcarcely five inches long, and the tail, which is thick and only fcattered with 

 hair, is not quite three: The upper parts of the body are of a pale tawny, or yellow colour, fometimes 

 brownifh ; the lower parts are white ; and the hind part of the body is confiderably thicker than the 

 fore parts : The head and fnout are more lengthened than in the Common Jerboa ; the neck is re- 

 markably fhort ; the ears are large, oval, and naked ; the circumference of the mouth and the feet 

 are white; the foles of the feet are thickly clothed with fur; the thumbs of the fore paws have fcarcely 

 any claw ; the hind thighs are very thick, ftrong, flelhy, and have little hair. 



595 5« Marfh Jerboa. — 5. Dipus tamaricinus. 5. 



Has five toes behind, and three before, with the rudiments of a fourth ; the tail is ob- 

 fcurely annulated. Schreber, iv. t. ccxxxii. 



Mus tamaricinus, or Tamarifk Moufe. Pallas, Glir. 88. n. 31. t-xix. D°. It. ii. 202. 



Inhabits the fait marfhes near the Cafpian Sea^ — This fpecies probably feeds on the fruit of the 

 Tamarix and Nitrarium, which grow in thefe marfhes ; and, under the roots of thefe trees, it forms 

 very deep burrows, which have two entrances: It is a very elegant little animal, about five inches and 

 a half long, from the nofe to the rump ; the tail is about the fame length, and is covered with hair,,, 

 having a flight bufhynefs at the extremity ; the upper parts of the body are of a yellowifh brown 

 grey colour, and the under parts white ; the ears are large, oval, and almoft naked ; the fore paws 

 have each a remarkable protuberance in place of the thumb, or inner toe.. 



596 6. Labradore Jerboa. — Dipus labradoriut. 



Has four toes before and a tubercle inftead of a thumb; four long flender toes behind 

 and a fhort thumb or great toe : The tail is taper, flender, and almoft naked. 

 Labradore. Jerboid Rat. Penn. hilt, of quad. n. 295. Arct. zooL n. 6.3, Muf. of the Roy. Soc. 



Inhabits Hudfon's Bay and Labradore. — This fpecies was fent over from Hudfon's Bay by Mr 

 Graham- The nofe is blunt, and the mouth is placed much underneath, having a divided upper lip ; 

 the ears are large, rounded, and naked ; the body and head are little more than three inches long, 

 and the tail is four inches and three quarters ; the upper parts of the body are of a deep brown co- 

 lour ; the under parts are white A and divided by a longitudinal yellow line, on each fide, from the 

 brown colour of the back. 



597 7. Circaffian Jerboa.— Dipus circafficus. 



Of a chefnut colour, with the body confiderably lengthened and equally thick ; the tail, 

 long and bufhy. 

 Circaffian jerboid Rat. Penn. hifi. of quad. n. 295. A.. 



Inhabits the neighbourhood of the river Terek in Circaffia.— Is about the fize of the Hamfter; the 

 ears are like thofe of a Moufe; the eyes are red and fparkling ; the teeth are fharp; the hair is long,. 



efpecially 





