236 EMBRYOLOGICAL TYPES 



Literature 



Bonnet, R. Lehrbuch der Entwicklungsgeschichte. Parey, Berlin, 1920. 

 Jenkinson, J. W. Vertebrate Embryology. Oxford, at the Clarendon 



Press, 1 91 3. 

 Kellicott, W. E. Chordate Development. Henry Holt, New York, 1913. 

 Prentiss, C. W., and, Arey, L. B. A Laboratory Manual and Text-book 



of Embryology. Saunders Co., Philadelphia and London, 1922. 



