ALLEN: MAMMALIA. 209 



lie gave were probably not maximum and this is undoubtedly true. Our smallest 

 specimen is immature, and its skull agrees almost exactly in size and proportions 

 with that figured by the describer. The four others are adult and considerably 

 larger. The collector's measurements of these follow: 



The skull of No. 7562 measures: greatest length, 75 mm.; basal length, 

 72; palatal length, 48.5; zygomatic breadth, 60; mastoid breadth, 36; inter- 

 orbital constriction, 11; mandible from condyle to. tip of incisor, 61.5; alveolar 

 length of upper cheek teeth, 17; alveolar length of lower cheek teeth, 15; upper 

 diastema, 24; lower diastema, 12.5. 



Three of the four adults have a midventral white streak on the chest. 



MURIDAE. 



MYOSPALAX FONTANIERI (Milne Edwards). 



This species was originally described on the basis of a specimen from Pekin, 

 and later Milne Edwards recorded others from Siwan, sixty miles to the north- 

 west. Thomas (1908a, p. 978) has recently recorded the species from the Ordos 

 Desert in the Province of Shensi, and from localities in the Province of Shansi 

 to the eastward. Two specimens were obtained by Mr. Zappey in Hupeh, at 

 Showlungtan and Kongchikow respectively, constituting apparently the most 

 southeasterly localities yet known for the genus. While seemingly representing 

 Milne Edwards's species, it is possible that they may eventually prove to con- 

 stitute a slightly different race. In cranial characters they agree closely with 

 M. fontanieri as figured by Milne Edwards in his "Recherches." They seem to 

 differ, however, in the absence of a white median streak in the forehead, although 

 in both our examples there is more or less white about the muzzle and on the 

 upper and lower lips. This marking was believed by Milne Edwards to be 

 inconstant, but Thomas found some trace of it in all of his eleven specimens 

 from Shensi and Shansi. Moreover the nose pad in our two specimens is pro- 

 duced at its upper median border into a somewhat mitre-shaped lobe instead of 

 being evenly rounded dorsally as figured by Milne Edwards. The exact value 

 of these differences is not clear in the lack of material for comparison. From 



