82 



every tabulated part of the epidermis, offering about the same type 

 as the tail shows. 



The hands and feet (see plate V, figs. 4 and 5) are stouter deve- 

 loped than in any other rat; compared with Uromys macropus the 

 measurements are for this animal 35 and 65 Mm., for M. armandvillei 

 47 and 86 Mm.; the differences in the foot-pads will be readily per- 

 ceived by comparing Peters' plate with our plate, figs. 4 and 5. 



Skull and dentition. In comparing the different parts of the skull 

 (plate V, figs. 1, 2 and 3) with the same boDy parts figured by Peters 

 (1. c. figs. 6, 7, 8 and 9) it will strike, that although M. armand- 

 villei is a larger specimen, its skull is shorter than that of Uromys 

 macropus and the distance between incisors and first molar is much 

 shorter; the molar series, the anterior palate foramina and the bulla 

 auditiva however are much stouter and more developed than in ma- 

 cropus. In the latter the upper molar-series runs much more parallel, 

 meanwhile they are conspicuously convergent in armandvillei, so that 

 the distance between the first upper molars is relatively much nar- 

 rower than in any other large Rat that I know. The absence of an 

 outwardly arched malar process distinguishes the skull of armandvillei 

 at once from the skull of macropus and at the same time from the 

 species of mice belonging to the section Nesokia, which have a very 

 expanded malar process. Tn this respect our species agrees much more 

 with the yellow-tailed Mus meyeri, with which species it also has in 

 common the form of the lower molars (Cf. my Catalogue ostéologique , 

 1887, plate 7, figs. 5 and 8). 



Appendix on Mus setifer Horsfield. 



Above I mentioned Mus setifer Horsfield, a species always badly 

 understood by authors working on Indian Mice, see apud Blanford, 

 Oldfield Thomas and Anderson, and this apparently by lack of material. 

 As Horsfield very exactly described the external characters as well, 

 as remarked the transversely grooved molars , I think that to the com- 

 plete knowledge of the animal there is only wanting a good drawing 

 of its skull. From a study of plate V, figs. 8, 9 and 10 it will be 

 evident that setifer has a very expanded malar process and molars 

 with transverse laminae and that it belongs to the section Nesokia. 



