RODEXTIA. 



521 



l-Ju. 447.— SQUIKREL. 



The Flying Squirrels {Pteromys *) have on each side of the body 

 a prolongation of their skin, extending between the fore and 

 hind legs, and forming a paraclinte, by the aid of which these 



Fig, 448.— eocky mountain flydcg squikrel. 

 TTTepoV, pteron, a wing ; fivs, mus, a mouse or rat — iviuged-rat. 



