1904.] On llw Zoological Distribution, etc., of Cancer. 



09 



chromosomes of the somatic mitoses, and the rings of the heterotype 

 division, being of diagrammatic clearness. Homotype mitoses 

 occurred, but were very few in number. Mitoses in the stroma 

 are relatively scanty in the tumours at our disposal, but such as have 



Fig. 1. — Adeno-carcinoma of Trout. Fig. 2. — Epithelioma of Mouse. Somatic 

 Homotype amphiaster. Reduced prophase and amphiaster. 



number of chromosomes, arranged 

 transversely in spindle, and showing 

 longitudinal splitting. 



Fig. 3— Epithelioma of Mouse. Heterotype mitosis, late prophase. 

 Ring loop and bivalent chromosomes. 



been seen are somatic in character. Farmer, Moore, and Walker 

 record a similar result. In the mouse it has been possible to compare 

 the mitoses in the testis, and those occurring in the irritation 

 produced by iodine, with the result that the significance of the 

 mitoses in cancer has been further confirmed. 



