52 
REPORT ON ZOOLOGY, MDCOCXLII : 
3'" : in Carolina and Georgia : climbs very well. Very like M. leucopus, 
but somewhat larger, and the ears rather shorter. 3. M. michiganensis ; 
light greyish-brown, beneath whitish ; cheeks yellow ; body 4:" ; tail 
2^" ; ear 4'" ; from Michigan. DitFers from M. leucopus by its much 
shorter tail, shorter ears, and the white not extending to the sides. 
4. M. carolinensis ; light lead colour (hairs of one colour), beneath 
somewhat paler; ears long and hairy; upper cutting teeth slightly 
furrowed ; body 2" 4'" ; tail 2" 9'" ; ear 4'". Not numerous on the 
coasts of South Carolina. 5. M. Lecontii ; above dark reddish-brown 
(hairs at root lead coloured) ; beneath light fulvous ; ears slightly pro- 
jecting from the fur ; upper cutting teeth deeply furrowed ; body 2y ; 
tail 2" ; ear 1 ^'" : from Georgia. Professor Schinz showed me two 
mice, which came from the same State ; one of which agrees with 
M. Lecontii, the other, which seems undescribed, I have named Mus 
polionotus : M. supra flavido-plumbeus, subtus pedibusque albidus ; 
auriculis mediocribus ; dent. prim, integris ; cauda pilosa abbreviata ; 
body 2" 4'" ; tail 1" 2"' ; ears 4^" ; hind foot 7"'. As mentioned already, 
neither species belong to Mus, but their teeth are unknown to me. 
Four new Brazilian species of Hesperomys have been described in 
these Archives by the reporter, 1842, 1 Bd. p. 361 : — (Oxymycterus) 
rostellatus,y^Sign.,‘, H. arviculoides, Piet.; H. orohinus ; and H. suh~ 
Jlavus, Wagn. 
With regard to Phloeomys Cumingii, described by Eydoux and 
Souleyet (Voy. Sur la Bonite, Zool. i. p. 43, tab. 7), I must remark, that 
it is very different from the animal characterized by Waterhouse. The 
latter, which I myself had an opportunity of examining at Vienna, is 
quite black on the back ; tail and feet foxy black. On the other hand, 
the French zoologists describe their animal as mostly white. It appears, 
therefore, to be either an Albino, or some other species. 
MuyS barharus, and Rhombomys robustus, Wagn. (Gerbillus Shawii, 
Duv.), have been amply illustrated by Duvernoy and LerebouUet in the 
Mem. de Strasb. iii. The anatomical peculiarities, particularly the eye, 
and several systems, have been illustrated with great exactness in both 
these species, as well as in Dipus mauritanicus. Two plates represent 
these as well as the animals themselves. 
The newly described Jmnping Mice of Ruppell and A. Smith have 
already been noticed in my monograph, where also a new species from 
Syria is described. 
Gerbillus erythrurus. Gray (Ann. x. p. 266) ; fur grey -brown, rather 
grisled, under fur lead-coloured ; abdomen whitish ; chin and throat pure 
white; tail covered with pale chestnut-brown hairs,* those near the 
* The name erythrurus (erythroura, Gray), is therefore quite unsuitable. 
It would have been better cdllad f uscicaudus. 
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