276 On the Tertiary and Secondary Rocks forming the 



which falls off only as the feathers take its place. It is still 

 clothed as if intended to live in the country whence its pa- 

 rents have heen hut lately brought. 



The facts above related, adds the Doctor, were observed 

 without the preconceived idea of attaching them to any the- 

 ory; but, on examining them, one is naturally led, he thinks, 

 to the following inferences : 



1st. That, when certain animals are transported to a new 

 climate, it is not the individual only, but the races, that re- 

 quire to be naturalized. 



2ndly. That when this naturalization takes place, there 

 are commonly introdnced in these races, certain durable 

 changes, which bring their organization to a state of accord- 

 ance with the climates in which they are destined to live. 



3rdly. That the habits of independence soon make the 

 domesticated species resume the characters of the wild spe- 

 cies from which they have sprung. 



On the Relations of the Tertiary and Secondary Rocks 

 forming the Southern Flanks of the Tyrolese Alps 

 near Bassano* By Roderick Impey Murchison, 

 F.R.S. Sec. G.S. F.L.S. &c. &c. 



[ From the Annals of Philosophy for June, 1829.] 



That various members of the secondary deposits replete with 

 marine remains are found in dislocated positions in some of 

 the highest regions of the Alps, was long ago noticed by De 

 Saussure ; and the fact has since been confirmed by many 

 other geologists. The inference derived therefrom, that such 

 remnants can alone have been placed at these heights by ele- 

 vation from beneath the sea, is now considered by the greater 

 number of observers to be the only philosophical mode of ex- 

 plaining the phaenomenon. The object of this memoir is to 

 determine whether the same causes of elevation were applied 

 at a subsequent period to those newer or tertiary deposits 

 which now form a belt around the flanks of the Alps. The 

 solution of this question is called for, because the evidence 

 on this point has hitherto remained so imperfect, that several 



* As the interesting communication of Dr. Thorn, published in our present 

 number, gives reason to believe, that much curious information will be fur- 

 nished by a thorough investigation of the Geology of South Africa, we beg, 

 therefore, to recommend to the colonists the collecting of all sorts of rocks 

 or stones bearing any kind of natural impressions or figures, however trifling. 

 In order to shew the character of some formations constituting the flanks of 

 a high mountainous range in Europe, and of the organic remains found in 

 them, we have here reprinted the remarks of Mr. Murrhir.on.-EDt 



