MAMMALIA. 691 



complex than those of Dipus, are figured by F. CDVIEE Des dents des 

 Mammif. No. 76, p. 189.) 



Jaculus WAGLER, WAGX., Meriones F. Cuv. (not ILLIG.). 

 Upper incisors indented by a longitudinal groove. Molar teeth 



4 4 



2 2 , furnished with roots, the first upper small, the rest with 

 o o 



crown figured by undulant folds of enamel. Ears rounded, with 

 short hair. Fore feet with four toes and hallucar wart with flat 

 nail ; hind feet pentadactylous, with three middle toes long, strong. 

 Tail very long, somewhat naked. 



Sp. Jaculus labradorius WAGN., Gerbittus labradorius HARLAN (Faun. Americ. 

 p. 157), Meriones labradorius RICHARDSON, Fauna bor. Am. PI. 7, p. 144; 

 in the Northern regions of North America ; a small animal of the length 

 of about i o inches, of which the tail forms more than one-half ; red-brown, 

 darker brown on the back, on the sides and below white. 



Note. Genus Dipodomys GRAY, furnished with buccal pouches, is un- 

 known to me. Sp. D. Philippii from Mexico. See Ann. of nat. Hist. 

 vii. 1841, pp. 521, 522; Dipodomys agilis GAMBEL from California, ib. 

 Sec. Series, Vol. in. 1849, p. 318. 



Family XXXI. Sciurina. Incisor teeth smooth, com- 



5-5 / 4-4 4-4\ 



pressed, molars mostly -: -. sometimes - A - A or - - , enamelled 



/ 4 4\ 4 4 3 3/ 



continuously or complex, furnished with roots. Feet either all 

 pentadactylous, or fore feet with four toes and thumb- wart. Tail 

 hairy. Clavicles perfect. 



Phalanx I. Myoxina. 



4 4 

 Myoxus ZlMMERMANN, BoDD., GM. Molar teeth j- ^ , with 



rows in each jaw parallel, remote, the crown with transverse striae 

 narrow, approximate. Ears moderate, rounded and oval, with short 

 hair. Whiskers long. Fore feet with four toes and hallucar wart, 

 clawless, hind feet pentadactylous ; claws small, compressed, in- 

 curved, sub-erect. Tail long, densely clothed with lon<* hair, in 

 some sub-distichous. 



Sp. Myoxus glis SCHREB., Sciurus Glis L., BUFF. vm. PI. 24, SCHREB. 

 Saugih. Tab. 225, Gu^R. Iconogr., Mammif. PI. 14, fig. 2 ; le loir, der 

 Siebenschlafer ; pale ash-coloured, white below, a dark brown ring round 

 the eyes, size of a rat ; this species is the glis of the ancients, which they 



442 



