76 



On the Zoological Distribution, etc., of Cancer. [Jan. 12, 



Fig. 8. — Spindle cell sarcoma. Codfish. Secondary nodule, wall of swim bladder. 



x 1500 (reduced). 



DESCRIPTION OF PLATE. 



Adeno -Carcinoma of Trout. 



(1) The chromosomes in the stroma mitoses are long slender Y-shaped loops, which 



split longitudinally, 24 in number. They are somatic in type ; compare 

 fig. 2 from the tumour. 



(2) Somatic equatorial plate in margin of tumour, seen from the pole, slender 



Y-shaped cbromosomes 24 in number arranged transversely on the spindle, 

 and showing longitudinal splitting. All the chromosomes are not reproduced 

 in the figure. 



(3) Microphotograph (untouched) of somatic equatorial plate. 



(4) Microphotograph (untouched) of heterotype amphiaster seen from pole. 



(5) Heterotype amphiaster (polar view). Small ring chromosomes present in 



reduced number (12). All the chromosomes are not reproduced in the 

 figure. This is a drawing of the mitosis photographed in fig. 4. 



(6) Heterotype amphiaster, lateral view (one centrosome only in this section). 



King chromosomes in reduced number arranged longitudinally on the 

 spindle. All the chromosomes are not figured. 



