This species is about the size of _Mus Rattus_, but is stouter in its
proportions; as in _Mus nasutus_, the thumb is furnished with a pointed
claw. The molars of the lower jaw are figured in Plate 34, fig. 11, _a_.
“This rat was caught in so wet a place amongst the flags bordering a
lake, that it must certainly be partly aquatic in its habits.”—D.
21. MUS BRAZILIENSIS.
PLATE XIX.