THE JOURNAL OF MORPHOLOGY 



VOLUME 23, NUMBER 4, DECEMBER 20, 1912 



CONTENTS 



Robert Matheson 



The structure and metamorphosis of the fore-gut of Cory(Jalis 

 cornutus L. From the Entomological Laboratory, Cornell 

 University. Twenty-nine figures 581 



W. M. Smallwood and Elizabeth G. Clark 



Cliromocloris zebra Heilprin, a distinct species. From the Ber- 

 muda Biological Station for Research and from the Zoological 

 Laboratorj', Syracuse University. Six figures 625 



S. W. Williston 



Primitive reptiles. From the Paleontological Laboratory, the 

 University of Chickgo. One figure 637 



Gary N. Calkins 



The paedogamous conjugation of Blepharisma undulans St. From 

 the Department of Zoology, Columbia University. Twenty-five 

 figures 667 



B. W. Kunkel 



The development of the skull of Emys lutaria. From the Ana- 

 tomisches Institut, Freiburg i. B., and the Sheffield Biological 

 Laboratory of Yale University. Thirty-one figures 693 



THE WAVERLY PRESS 



BALTIMORE. U. S. A. 



