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EXPLANATION OF PLATE V. 



Dicrostonyx gulielmi Sanford. 



Fragmentary skulls and mandibular rami from a Pleistocene deposit in 

 Hutton Cave, Somersetshire. These remains, in Taunton Museum, 

 were described by Sanford in 1870 and are the co-types of the species. 

 The upper molars of the more perfect skull are shown in Fig. 71, *■ 



