Trans Roy. Soc. Edin r , Vol XXXIX 

 D R R. Broom on Mammalian Organ of Jacob son — Plate I. 



Ili 18. 



M«F*ria.ne & ErGltine GmKH Edin r 



ORMTHORHYNCHUS, ECHIDNA, DASYURUS, 



PETAURUS, DASYPUS. 



