SPONTANEOUS NEOPLASMS IN MICE 



20I 



Sebaceous-like 

 tumor cells 



Undifferentiated 

 ''3& epithelial 



ji.-;;^ tumor cells 



Fig. ioq. — Carcinoma of skin appendage origin from the head region (X200) 



Marrow 



Fig. no. — Osteoma of a tail vertebra (X75). 



