178 Edmund B. fVilson 



Fig. II 

 24-chromosome forms, two supernumeraries. 

 a-e, term., No. 21, first polar, showing various groupings; g, the same, gran., No. 52 (Photo 7). 

 h, term.. No. 21, second polar, tetrad element near center. 



i-o, somatic groups from individuals with two large supernumeraries; ;"-/, spermatogonia! groups 

 from term. No. 21; m, n, ovarian groups from fem. No. 31; 0, ovarian group, fern., No. 45. 



/)-r, spermatogonia! groups from fern.. No. 22, with one large supernumerary and one small; Photo 

 30). 



s-w, second division, side-view; s, term.. No. 21; t-w, gran., No. 52 (Photo 21). 



