GENERAL OBSERVATIONS 



61 







c a 



Fig, 33. — Horizontal Section of Horn through the Junction 

 of the Wall with the Sole. 



a, Horn tubule of the wall ; b, horn tubule of the sole ; c. d. horny 



laminae. 





Fig. 34. — Section of Frog through Corium and Horn. 



The long finger-like projections of corium into epidermis are sections 

 of the long papillae from which the horn-tubes of the sole grow. 

 In the stainable portion of the epidermis are to be clearly seen 

 light and dark streaks pointing out the alternate strata-like ar- 

 rangement of cells mentioned in the text (Mettam). 



