216 LEPORID&. 
Nature rerum paupertas, ut depravatione formarum va- 
rietatem sibi querere velit; estque, ut omnia probant, 
imaginaria hee specierum transmutatio.”. We can now 
add to the proofs of the stability of generic and specific 
characters which Pallas might have derived from the orga- 
nization of the Siberian species of Lagemys, the fact that 
a species of that genus whose chief external characters 
might be explamed by hypothetical degeneration of the 
ears, hind-legs, and tail of the Hare, claims as high an 
antiquity as any species of the true genus Lepus. 
Remains of a Lagomys were discovered by Professor 
Sedgwick and Mr. Murchison in a lacustrine deposit at 
(Eningen, associated, like the Pika of Kent’s Hole, with 
a species of Fox, indistinguishable from that now exist- 
ing, and affording another of those instructive examples 
which exhibit a gradual passage from an ancient Fauna, 
or animal population, to that which now prevails. 
