152 On thejbniier Temperature oftJie Norther >l liegiuna. 



serve that Cuvier found the head in the engravings given by 

 Pallas to differ very greatly from that of the musk ox; and, 2dly, 

 supposing this to have arisen only from errors of the designer, 

 and the head to have been really that of the musk ox, it may 

 have been (as Pallas himself supposed) drifted thither by cur- 

 rents in the Arctic Sea at a period comparatively recent. 



I will add also, that the bones of cetacea, which might, at 

 first sight, seem to indicate a cold ocean, either belong to spe- 

 cies resembling those of the Mediterranean, (the Raiqual) ; or to 

 extinct genera, the ziphius ; or are considered by Cuvier as doubt- 

 ful. 



Of the Continuity of the Animal Kingdom by means of Ge- 

 neration, from the first Ages of the World to the present 

 Times. 



On the relatious of organic structure and parentage that may ex- 

 ist between the animals of the historic ages and those at pre- 

 sent living, and the antediluvian and extinct species. 



AuE the animals whose remains occur buried in the earth, and 

 which almost all belong to species or genera which are not ob- 

 served in the living state, to be considered as having been the 

 ancestors of those which now people the earth, and as having 

 been modified by the influence of time, and of the changes that 

 have supervened in the state of the globe ? Or is the contrary 

 opinion to be adopted ? Are we to believe, that, after the oc- 

 currence of great cataclysms, new beings were produced by a 

 new exertion of creative power, — in short, to make use of M. 

 GeofFroy St Hilaire''s expression, that the six days work was re- 

 sumed. The solution of this great question is to form the sub- 

 ject of a series of memoirs to be laid before the French Aca- 

 demy of Sciences, of which the first only has been read. 



The author of this memoir, M. Geoftroy St Hilaire, com- 

 menced with remarking, that science is not yet possessed of all 

 the documents that might appear necessary for treating the 



