176 BIBLIOGRAPHY. 



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Lacertilia. 



(156) F. M. Balfour. "On the early Development of the Lacertilia, together 

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(157) Emmertu. Hochstetter. " Untersuchung iib. d. Entwick. d. Eidechsen 

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(161) H. Dutrochet. "Eecherches s. 1. enveloppes du foetus." Mem. d. Soc. 

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{162) W. K. Parker. "On the skull of the common Snake." Fhil. Trans,, 

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(163) H. Eathke. Entwick. d. Natter. Konigsberg, 1839. 



Chelo7iia. 



(164) L. Agassiz. Contributions to the Natural History of the United States, 

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(165) W. K. Parker. " On the development of the skull and nerves in the green 

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(166) H. Eathke. Ueb. d. Entwicklung d. Schildkroten. Braunschweig, 1848. 



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