676 CLASS xvn. 



einer Naturgesch. des Hamsters. Mit Kupf. Gottingen u. Gotha, 1774, 

 8vo. PALLAS discovered various other small species of this genus in Siberia, 

 as Cricetus sonyarus PALL. Glir. Tab. r6s, Cricetus arenarius PALL. Glir. 

 Tab. 1 6 A, &c. 



Hapalotis LICHTENST., Conilurus OGILBY. Incisor teetli smooth, 



Q 



coloured, molars * 5 ^ , tuberculate. Ears long, oval, with short 

 o o 



hair. Bristles very long. Feet pentadactylous, anterior with 

 pollex very short, resembling a wart, with claw small ; posterior 

 long, saltatory, with three middle toes long, subequal; claws 

 incurved, compressed. Tail long, tufted at the extremity with 

 longer hair. 



Sp. Hapalotis albipes LICHTENSTEIN, Darstellung der Saugtk. Tab. 29; 

 Conilurus constructor OGILBY, Transact, of the Linn. Soc. xvm. p. 1-25, 

 Hapalotis constructor GOULD, Mamm. of Austr. II. PI. 8; grey, brown on 

 the back, whitish below; tail brown, white below. This species builds 

 a conical nest of twigs, resembling a beehive ; Hapalotis MitcJtellii, Dipus 

 Mitchellii OGILBY, GOULD 1. 1. i. PI. 15, KRAUSS 1. 1. Tab. 20, fig. n; 

 much smaller than the preceding. Compare on this singular genus, which 

 recalls the similarly formed genus Dipus of Australia, GRAY in Ann. of 

 not. Hist. n. 1839, pp. 307 309. 



Meriones ILLIG., G-erbillus DESMAR. Upper incisors indented 



3 3 



almost always by a longitudinal groove. Molars (~ = equably 



o o 



enamelled), furnished with transverse hills forming, when worn, 

 oval figures, like lamellce, surrounded by enamel. Ears exsert, 

 oval. Head protracted, acuminate in front. Fore feet with four toes 

 and hallucar wart, hinder pentadactylous, with tarsus and toes 

 elongate. Tail long, hairy, often pencilled towards the tip. 



Sp. Meriones pyramidum'W AGN., Dipus pyramidum GEOFFB., GUER. Iconogr., 

 Mammif. PI. 26, fig. i, North Africa; Meriones tamaricinus KUHL, 

 Dipus tamaricinus PALL. Glir. Tab. 19 (copied in SCHREB. Tab. 232), at 

 the Caspian Sea, &c. A tail with short hair and without a tuft at the tip, 

 occurs in Meriones Scklegelii from the Cape of Good Hope, SMUTS Enum. 

 mamin. capens. Tab. i. 



(Here belong the genera Khombomys WAGNER and Psammomys CRETSCH- 

 MAR, RUEPPELL, the last with upper incisors not grooved.) 



Compare on this genus F. CUVIER Me"moire sur les Gerloises et les Ger- 

 bttles, Transact, of the Zool. Soc. n. 2, 1838, pp. 135 148, PI. 22 26; 

 SUNDEVALL in k. vetensh Ac. Handl. 184-2, pp. 226 235, Tab. II. These 

 animals do not spring on their hind feet, like all the species of Dipus (see 

 below), with which they were formerly incorrectly associated. 



