MAMMALIA — RODENTIA. 
51 
edge ; ears hairy ; fur soft, with some longer bristles ; hind feet very 
long, slender, soles bald beneath; toes 4-5, long, the three middle 
almost equal, the hinder middle very long; the front outer scarcely 
visible; the front inner weak; tail very long, scaly, with scattered 
hairs, and with longer more crowded hairs at the tip. Very like the 
American Gerbilli (jaculus) in external appearance and form of hind 
feet ; differs from Dendromys in the form and proportion of the toes : 
lives in bushes and trees in India. The species is Mus oleraceus, Sykes ? 
or M. longicaudatus of Elliott. 
To Smith’s genus Otomys, the reporter had to furnish a new name, 
Malacothrix (Schreb. Suppl. iii. p. 496), because Fr. Cuvier had, nine 
years previously, given the same title to another genus {Euryotis). 
With regard to the new species which have been added to the genus 
Mus, and even to the family Muridae, I shall refer for a notice of them 
to my monograph of this group, in order to gain room ; and I shall only 
occasionally notice some species, while I shall more closely consider such 
others as have come to my knowledge since the printing of that work. 
Lesson’s Mus cmruleus has slipped out of some colony into the granaries 
of Rochefort ; above slate blue ; beneath bluish ash-grey ; tail blackish ; 
extremities flesh coloured (Tab. du Regn. Anim. p. 138). Selys (Rev. 
Zool. p. 346), considers the Mus hibernicus as an accidental variety of 
M. rattus. Tobias of Gorlitz, has imparted some interesting observa- 
tions on the habits of the Mus minutus, and formation of its nest. 
(Isis, 1842, p. 337.) RiippeU has described and given drawings of the 
North East African Mice, in the Mus. Senckenb. iii. p. 104 ; viz., Mus 
abyssinicus, albipes, leucosternum, dembeensis, imberbis, and Crice- 
tomys gambianus. Of M. alexandrinus, RiippeU mentions, in the 
Verz. d. Senck. Samml. p. 29, that he has received one from North 
America ; and the reporter has it from the Brazils, — a proof how widely 
these Mice are extended. 
Baclimann has described five new species in the Journ. of 
the Acad, of Nat. Sc. of Philadelphia, viii. p. 300, which he 
places under Mus, but which, as the reporter supposes, do 
not, perhaps, collectively belong to this genus, hut must fall 
under Hesperomys, and, perhaps, under genera yet to be 
established. 
1. Mus humilis ; reddish-grey above (hair at under part lead-coloured), 
beneath light fulvous ; cheeks, and a side streak, bright rust colour ; tail 
thinly covered with hair, above brown, beneath somewhat lighter; 
body 2" 9'" ; tail 2" 4'" ; ear 3'" : South Carolina. 2. M. (calomys) 
aureolus ; above bright orange colour; belly light fulvous; throat, 
breast, and fore-feet, white ; body 4" 3'" ; tail 3" 1'" ; ear, posteriorly, 
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