676 CLASS XVII. 



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

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

 as Oricetus sonyarus Pall. Glir, Tab. iGn, Crlcctus arenarius Pall. Giir. 

 Tab. 1 6 A, &c. 



Hapalotis LiCHTENST., Comlurus Ogilby. Incisor teeth smooth, 



3-3 



coloured, molars ^ — y , tuherculate. Ears long, oval, with short 



hair. Bristles very long. Feet pentaclactylous, 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, Barstelhing der Sdugth. Tab. 29; 

 Comlurus constructor Ogilby, Transact, of the Linn. Soc. xviiL p. 125, 

 Hapalotis constructor Gould, Mamm. of Aitstr. 11. PI. 8; grey, brown on 

 the back, whitish below; tail bi-own, white below. This species builds 

 a conical nest of tw;gs, resembling a beehive ; — Hapalotis MitchelUi, Dipus 

 MitcJiellri Ogilby, Gould 1. 1. i. PI. 15, Krauss 1.1. Tab. 20, fig. 11; 

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

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

 nat. Hist. II. 1839, pp. 307 — 309. 



Meriones Illig., GerhiUus Desmae. Upper incisors indented 



3 — 3 



almost always by a longitudinal groove. Molars (^ — ^ equably 



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

 oval figures, like lamellse, 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. Merio7ies pyramidumWAGN., Di2ms pyramidum Geoffr., Guer. Iconogr., 

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

 Dipiis 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 ScJdegelii from the Cape of Good Hope, Smuts Enmn. 

 mamm. capens. Tab. i. 



(Here belong the genera Rhomhomys Wagner and Psammoniys Cretsch- 

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



Compare on this genus F. Cuvier Memoire sur les Gerhoises et les Ger- 

 billes, transact, of the Zool. Soc. Ii. 2, 1838, pp. 135 — 148, PI. 22 — 26; 

 SuNDEVALL in k. vdenslc. Ac. Handl. 1842, pp. 226 — 235, Tab. 11. These 

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

 below), with which they were formerly incorrectly associated. 



