486 



MURID^— ARVICOLA 



DIMENSIONS IN MILLIMETRES— coniinued :- 



1 With 5 large em bryos. 



2 The skull shows that this specimen is an aged individual; the condylo-basal length is 41-9 mm., the 



ridges are strongly developed and fused in the inter-orbital region. 



3 All these specimens are probably immature, and some of them are brown in colour. 



