364 ORILLA STOTLER WERNER. 



PLATE 6. 



FIG. 30. Chromosome complex taken from embryonic female gonad of chick. 

 After Hance. In the original drawing the large chromosome at the top of the cell 

 is labeled A to indicate that it is the largest in the complex. It is not paired in the 

 cells of the female. I have added the line to the drawing to indicate a possible 

 gonomeric grouping. 



FIG. 31. Chromosome complex taken from a cell in an embryonic male gonad 

 of the chick. After Hance. In the original drawing the two largest chromosomes 

 at the top of the cell are labeled A, a, to indicate that they are the largest in the cell. 

 They are thus present in d uplicate in the male. I have added the line to indicate a 

 possible gonomeric grouping. 



FIG. 32. Somatic cell from the female of domestic chicken showing similar 

 grouping. After Schiwago. The lettering is according to Schiwago and is his indi- 

 cation of the "paternal" (right) and "maternal" (left) grouping of the chro- 

 mosomes. 



FIG. 33. Somatic cell from the male of domestic chicken showing same. After 

 Schiwago. The indications are as in figure 31. 



FIG. 34. Spermatogonia cell of domestic chicken. After Stevens. The 12 

 large chromosomes are arranged in peripheral position. I have drawn no line here 

 to indicate gonomeric grouping but such grouping is obvious. 



FIGS. 35 to 36. Somatic cell from embryo of lizard (Sceloporus spinosus). 

 After Painter. I have again added lines to each of the drawings to indicate possible 

 gonomeric grouping. 



