Comparative View of Crania of Aboriginal Americans. Ill 



be described as stratified granite. As is often the case, they 

 have in this country chlorite-slate and quartz-rock associated 

 with them. The description of these rocks to be found in any 

 elementary work on Geology, will equally apply to those of this 

 country. 



I have not made any mention of the igneous or unstratified 

 rocks in the above summary. Those met with in the course of 

 the above survey are basalt, greenstone, porphyry, hypersthene, 

 syenite, and granite. It is of course entirely foreign to my plan 

 to enter on a description of these rocks, as their characters are 

 constant in all countries. Any remarkable varieties in them 

 will be noticed in treating of the several localities in which they 

 were found. — (To be continued.) 



Comparative Fiew of the Skulls of the various Aboriginal Na- 

 tions of North and South America. By S. G. Morton, 

 Professor of Anatomy at Philadelphia.* 



Dr Morton (formerly a pupil of our University), who has 

 been for years actively employed in investigating the natural 

 history of the native inhabitants of the New World, we rejoice 

 to learn, has just published the i'esults of his labours in this very 

 interesting field of science, in a work which aifords ample 

 proof of his zeal, learning, and acuteness. As no copies of the 

 " Comparative View''' have as yet reached this country, we now 

 submit to our readers, and nearly in its original form, an ample 

 and judicious account of it, just published in the 78th Number 

 of Silliman's American Aurnal of Science and Art. 



The principal design of the work, says Dr Morton, has been, 

 " to give accurate delineations of the crania of more than forty 



* The following is the full title of the work of Dr Morton :— " Crania Ame- 

 ricana ; or a Comparative View of the Skulls of various Aboriginal Nations 

 of North and South America ; to which is prefixed an Essay on the varieties 

 of the Human Species; illustrated by seventy-eight plates, and a coloured 

 map. By Samuel George Morton, M.D., Professor of Anatomy in Pennsyl- 

 vania College at Philadelphia." Philadelphia : J. Dobson» London : Simp- 

 kin, Marshall, and Co. Pp. 296, folio, 1839. 



