296 BIOLOGY OF THE LABORATORY MOUSE 



Dr. Margaret Reed Lewis and Dr. Warren Lewis, Wistar Institute, 



Philadelphia, Pa. 



No. or Symbol Type of Tumor 



6 sarcomata Transplantable in Bagg albino mice 



3 sarcomata Transplantable in Little C3H stock 



5 sarcomata Transplantable in Little C57 black stock 



1 sarcoma Transplantable in Murray dba stock 



4 white blood cell tumors Myeloid cells, 3 in dba and i in C57 black 

 4 white blood cell tumors Lymphoid cells, 3 in dba and i in C3H 



2 white blood cell tumors Monocytic, i in A stock and i in C57 black 



RoscoE B. Jackson Memorial Laboratory, Bar Harbor, Me. 



15091a Spindle cell carcinoma of the mammary gland 



(1928) originally diagnosed by Ewing and 

 Warthin as adenocarcinoma. Thirteenth gen- 

 eration became carcinoma simplex. Twentieth 

 generation gave evidence of transformation of 

 epithelial cells to spindle cells. A stock 



L946A 11. Fibrosarcoma originating in osteogenic sarcoma of 



the tail (1936). C57 black stock. No bony 

 elements 



E060 Papillary adenocarcinoma of the mammary gland 



(1936) C57 black 



C617 Adenocarcinoma of the mammary gland (1938) 



C57 brown stock 



dbrB Adenocarcinoma of the mammary gland (1920) 



dba stock 



S91 Melanoma (1937) primary at base of tail dba stock 



C252 Fibrosarcoma (1936) subcutaneous pelvic region 



C57 leaden stock 



C198 Reticulo-endothelioma liver — rare type (1936) 



C57 leaden stock 



P208 Melanoma (1937) on side of dba strain mouse 



P764 Embryonal cell carcinoma of the testis (1939) dba 



strain 



From the above list the great diversity of available material will be 

 evident. 



Practical Suggestions 



The following suggestions are made to those who desire to utilize genetic 

 knowledge in the transplantation of tumor tissue in mice. 



