1 86a] 



PEDIGREE OF MAMMALIA. 



135 



A, in the following diagrams, represents an unknown form, 

 probably intermediate between Mammals, Reptiles, and Birds, 

 as intermediate as Lepidosiren now is between Fish and 



DIAGRAM I. 



MAMMALS, 

 NOT TRUE MARSUPIALS iNOR TRUE PLACENTALS. 



TRUE,' 

 PLACENTAL. 



\TRUE 

 MARSUPIAL. 



\ 





K \ 



\ 



KANGAROO 



DIDELPHYS 





FAM. 



FAM. 



DIAGRAM II. 





TRUE MARSUPIALS, 

 LOWLY DEVELOPED. 





TRUE MARSUPIALS, 

 HIGHLY DEVELOPED. 







PLACENTALS 

 .---" PRESENT 



■'"""" / 



MARSUPIALS 



4 



I I 



\ 



% X 



KANGAROO DIDELPHYS 

 FAM. F » M 



Batrachians. This unknown form is probably more closely 

 related to Ornithorhynchus than to any other known form. 

 I do not think that the multiple origin of dogs goes against 



