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Show ] 9 0 5 . ] MAMMALS OF CHINA. 391, is greater than that of M. griseipectus. The ears are longer, and the colour of the under parts, which is white, differs from that of both M. JIavipectus and M. griseipectus by the fact that the hairs are white to tlieir bases and not slate-coloured. When working out Pere David's collection from Moupin, M. Milne-Edwards described a species under the name of M. ouangthomce, stating that it was distinguished by a pure white cross on the breast. It was described from a single specimen, which, by the kindness of Dr. Oustalet, I had the privilege of examining when in Paris, and I am of opinion that it is merely a |-grown example of this species. The white cross is not so conspicuous as one would be led to infer from the description^ and is merely a well-marked development of the white breast-mark which is found in many individuals of otherwise typical JIavipectus. Another species from the collection of Pere David was described by M. Milne-Edwards under the name M. plumbeus, and figured in the Rech. Mamm. This specimen I have also had an opportunity of examining, and the coloration depicted in the plate is much too blue. There is a specimen in the British Museum which agrees tolerably well with the description and type of M. plumbeus, but on examination of the skull it proves to be a very young individual, probably belonging to M . JIavipectus. The latter is the only specimen I have seen that shows white incisors, a characteristic of M. plumbeus. Under these circumstances, and as the skull of the type of M. plumbeus cannot be examined, as it has not been removed from the skin, we must, in the absence of further evidence, consider plumbeus as founded on an immature JIavipectus. Mus l o s e a Swinhoe. Mus Jlavescens Elliot, Swinhoe, P. Z. S. 1864, p. 186. Mus rufescens Gray, Swinhoe, P. Z. S. 1870, p. 636. Mus losea Swinhoe, P. Z. S. 1870, p. 637. This species may best be described as a small form of M. JIavipectus, to which it closely approaches in coloration. The under parts are, however, as a rule greyer. The tail is unicoloured and very finely annulated (the annuli being 14 to the cm. as against 12 in JIavipectus), and covered with minute and almost invisible setae. The ear is elongated, being longer by 2 mm. than immature JIavipectus of the same size. The skull, except in being A the size, is otherwise indistinguishable. Dimensions (from skin). Head and body 150 mm.; tail 123; ear 18; hind foot 26. Skull. Greatest length 32 mm.; basilar length 26 ; palatilar length 15; diastema 8 ; incisive foramina 6'5 ; length of nasals 12; zygomatic breadth 15; interorbital breadth 5; length of molar series 6'5 ; breadth of brain-case 14. P r o c . Z o o l . Soc.-1905, V o l . II. No. XXA 11. 27 |