CONTENTS. 



No. 20. The histogenesis and growth of the otic capsule and its contained periotic 

 tissue-spaces in the human embryo. By GEORGE L. STREETER (4 text-figures 

 and 4 plates) 5- 54 



21. The genesis and structure of the membrana tectoria and the crista spiralis of 



the cochlea. By O. VAN DER STRICHT (4 plates) 55- 86 



22. Study of a human spina bifida monster with encephaloceles and other abnor- 



malities. By THEODORA WHEELER (4 plates) 87-110 



23. A human embryo before the appearance of the myotomes. By N. WILLIAM 



INGALLS. (5 text-figures and 4 plates) 111-134 



