REPTILIAN SPERMATOGENESIS 303 



found where, apparently, several of these micro-chromosomes 

 had joined to form one long thin rod. In no case was it difficult 

 to distinguish between such thin rods and the V-shaped macro- 

 chromosomes. 



Figures C and E show the characteristic condition of the 

 somatic chromosomes for one embryo. In text figure 5, C, ten 

 large V-shaped macro-chromosomes are seen, together with 

 eleven smaller bodies. Of the latter one is a 'b' chromosome, 

 its mate is not identified. In text figure 5, E, there are also 

 ten large chromosomes, two 'b' chromosomes, and ten or eleven 

 micro-chromosomes (depending on how we interpret the small 

 bipartite bodies). 



The somatic chromosomes for a second embryo are shown 

 in text figure 5, D. Here there are ten macro-chromosomes, a 

 pair of 'b' chromosomes, which show with unusual clearness, 

 and ten or eleven micro-chromosomes. 



The chromosome complex of a third embryo is shown in text 

 figure 5, F and G. Here one finds at least twelve large V-shaped 

 chromosomes. In the cell shown in text figure 5, F, the 'b' 

 chromosomes may be identified, but instead of the dot-like micro- 

 chromosomes, one sees some elongated rods representing probably 

 several of these small bodies fused together. The cell shown in 

 text figure 5, G, taken from the same embryo, shows very clearly 

 the twelve large V's, the two 'b' chromosomes, and at least ten 

 micro-chromosomes. 



The chromosome complex of a fourth embryo is shown in 

 text figure 5, H. Here again there are twelve large V-shaped 

 chromosomes. Of these, one (marked 's') appears to have 

 broken in two. The 'b' chromosomes are less certainly identi- 

 fied, but are probably as labeled. Elongated rods represent, 

 no doubt, fused micro-chromosomes. 



The figures given above are typical for what one finds in each 

 embryo. There is never any difficulty in identifying the 

 large V-shaped chromosomes, but, as was noted for Anolis, 

 there is a tendency for the micro-chromosomes to fuse together 

 in some cells. This is not constant for an individual, however, 

 as a comparison of text figure 5, F and G, will demonstrate. 



