Miscellaneous, 155 



grades of subdivisions in the kingdoms of life, the nature of species, 

 genera, families, orders and classes. 



Chapter III. Notice,of the principal systems of zoology, includ- 

 ing observations on the systems of Aristotle and Linnaeus ; the 

 anatomical systems of Cuvier, Lamarck, Ehrenberg, Burmeister? 

 Owen, von Siebold and others ; the physio-philosophical systems 

 of Oken and McLeay ; and the embryological systems of Bollin- 

 ger, von Baer, Bogt, etc. 



Part II. North American Testudinata. 



Chapter I. The order of Testudinata, its rank, classification, 

 general characters, anatomical structure, geographical distribution, 

 geological history, etc. 



Chapter II. The Families of Testudinata. 



Chapter III. North American genera and species of Testudi- 

 nata — their characters, distributions, etc., for the several families. 



Part III. Embryology of the Turtle. 



Chapter I. Bevelopment of the egg from its first appearance to 

 the formation of the embryo. 



Chapter II. Bevelopment of the embryo from the time the egg 

 leaves the ovary to that of the hatching of the young, including 

 the laying of the eggs, — the deposition of the albumen and forma- 

 tion of the shell, — the absorption of albumen into the yolk sac, — 

 the transformations of the yolk in the fecundated egg, — segmen- 

 tation of the yolk, — the whole egg is the embryo, — foldings of 

 the embryonic disc and successive stages of growth of the turtle, 

 — formation and development of the organs, — histology, — chrono- 

 logy of the development of the embryo. 



The young of various species and the several successive phases 

 in embryological development are illustrated with details in the 

 plates, all of which are crowded full of figures. 



Ascent of Chimborazo. — The Edinburgh New Philosophical 

 Journal quotes the following interesting account of an ascent of 

 Chimborazo by a French traveller, M. Jules Eemy, and an Eng- 

 lish traveller, Mr. Brenchley : — 



"On the 23d of June, 1802, the illustrious Humboldt, accom- 

 panied by his friend Bonpland, made the first attempt to ascend 

 Chimborazo. On account of a pointed rock, which presented an 

 insurmountable barrier, they were unable to ascend above 5909 

 metres of the mountain, then regarded as the highest in the world? 

 and which still occupies a principal place among the colossi of 

 America. 



