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The most important deviations from these types exhibited 
among the members of the classes and orders of the Mollusca , 
and the palaeontological history of that sub-kingdom. 
The structure and development of the Lepidosiren , the Dog- 
fish, the Lepidostcus , the Lamprey, and the Amphioxus, as 
typical examples of the chief orders of the Class Pisces. 
The most important deviation from these types exhibited 
among the members of the orders of Fishes ; the palaeontological 
history of Fishes. 
The structure and development of the Frog and Newt as typical 
examples of the class Amphibia . 
The chief modifications observable among the orders o i' Amphi- 
bia, and their palaeontological history. 
The structure and development of a Snake, a Lizard, a Tor- 
toise, and a Crocodile, as typical examples of Rcptilia . 
The chief modifications observable among the orders of Rcpt ilia , 
and their palaeontological history. 
The third part of the Course will be devoted to: — 
The structure and development of Hydatina, A spidog aster, 
Tamia , A scar is, Nemertes , Echinus , Polynob’, Scolopendra , 
Blatta , /Scorpio, considered as types of the sub-kingdom 
Annidosa. 
The most important modifications of these types exhibited by 
the classes and orders of the Annulosa and their palaeontological 
history. 
The structure and development of the common Fowl, as a 
typical bird. 
The modifications of structure observable in the orders of 
Birds, and their palaeontological history. 
The structure and development of the Dog, as a typical 
Mammal. 
The extreme modifications of the Mammalian type observable 
in the Monolremata and Marsupialia , in the Porpoise, the 
Horse, the Bat, and in Man. 
The characters of the orders, and their palaeontological history. 
The affinities of the Mammalia one with another, and the 
relations of Man to other Mammals. 
Note books and examinations. — Students who propose 
to become candidates for Certificates of Proficiency, or for the 
Associateship of the Government School of Mines, are required 
to take careful notes of the Lectures on Natural History, 
and to subject their note books to occasional inspection ; they 
