IV CONTENTS 



No. 5. OCTOBER 



D. Davi'dson Black. The study of an atypical cerebral cortex. Nine 



figures 351 



J. B. Johnston. The morphology of the septum, hippocampus, and pallial 



commissures in reptiles and mammals. Ninety-three figures 371 



M. J. Greenman. Studies on the regeneration of the peroneal nerve of the 

 albino rat: number and sectional areas of fibers: area relation of axis to 

 sheath. Three figures 479 



No. 6. DECEMBER 



Caroline Burling Thompson. A comparative study of the brains of three 

 genera of ants, with special reference to the mushroom bodies. Forty- 

 two figures 515 



F. L. Landacre and A. C. Conger. The origin of the lateral line primordia 



in Lepidosteus osseus. Thirty-four figures 575 



C. JuDSON Herrick and Jeanette B. Obenchajn. Notes on the anatomy of 



a cyclostome brain: Ichthyomyzon concolor. Twelve figures 635 



