MAMMALIA. 
29 , 
Gray, Peters, Lilljeborg, Plyth, Sclater, &c., within the last ten 
years, are perfectly unknown to the author; so that all the erro/s 
in the generic diagnoses, corrected by them, reappear in this 
paper, in addition to those introduced by the author himself ! 
None of the recent species and genera are admitted, although 
some of the latter have received new names. 
Dr. Gray describes two new species from North Celebes, Mus cele~ 
hemis and Mus xanthura, Proc. Zool. Soc. 1867, May 23, p, 698,. and pro- 
poses to form for the former and Mus macropus a section, Gymnomys. 
Prof. Peters also describes Mus macropus, regarding it as the type of ft 
distinct genus, JJromys. Monatsber. Ak. Wiss. Berl. 1867, June 6, p. 343, 
with a plate. 
Mus rattus. Hr. Jeitteles states that this rat is still found in Moravia. He 
gives a detailed description of it, as well as of a hybrid between it and Mus 
dccumanus. He thinks that Mus hihernicus of Thompson was also a hybrid 
between these two species. L. c. pp. 24-36. 
Mus rattus and alexandrinus. Prof. Troschel states, in opposition to Do 
risle’s results, that these species are specifically distinct, as is evident from 
an examination of the skulls. He thinks that De I’lsle has mistaken a variety 
of Mus rattus for the true M. alexandrinus, Wiegm. Arch. 1866, ii. p. 170. — 
Dr. von Martens has given a review of De ITsle’s important researches 
(for which see Zoolog. Record, ii. p. 39). Zool. Gart. 1867, pp. 178-184, 
216-221. 
4 Acanthomys leucopus, sp. n.. Gray, Proc. Zool. Soc. 1867, p. 698, Cape York, 
North Australia. 
.^Ilapalotis. Mr. Krefft (Proc. Zool. Soc. 1867) describes as new species 
from Cape York, Hapalotis caudimaculata, p. 316, figuring the skull and den- 
tition (this proves to be identical with Mus macropus, Gray), and Hapahtis 
personata, p. 318. 
4 Echiothrix, a new genus of Rats, distinguished by the great elongation of 
the facial portion of the skull. Fur with an abundance of bristles, flat and 
channelled at the base. Upper incisors with two grooves, lower smooth, 
3 3 
white ; molars ; front molar much the largest, the hinder smallest ; the 
front upper rounded on the inner, and with two folds on the outer side ; the 
second upper with one fold on the outer side, the lower front with a alight 
subcentral fold on the inner side. Crown of the front upper molar with two, 
and the others with a single cross ridge. Echiothrix leucura, sp. n.. Gray, 
Proc. Zool. Soc. 1867, p. 699, with figure of skull and dentition. From Aus- 
tralia. 
^ Cricetulus is a new genus, intermediate between Arvicola and Cricetus, in- 
dicated by M. A. Mdne-Edwards, Ann. Sc. Nat. 1867, vii. p. 376 ; cheek- 
pouches much developed. Cricetulus griseus, sp. n., from North China. 
Arvicola and Hypudmis, M. Fatio has published a detailed 
monograph of the Field-miee of Geneva (see p. 4). He gives 
an exeellent deseription of the habits and zoologieal eharacters of 
the five speeies observed by him, eritieally treating of the various 
means by whieh naturalists have endeavoured to distinguish and 
arrange the speeies. He has also carefully compiled their synp- 
