Evolution of the lining bodies in the embryonic chick gonad

Abstract
Gonads from White Leghorn chick embryo of various ages ranging from 4 to 10 days of incubation, were fixed in half-strength Karnovsky’s fixative, osmicated and embedded in Araldite. Thin sections were stained with uranyl acetate and lead citrate. Our observations were especially concentrated on the germinal epithelium. Two cytological characteristics not previously described in embryonic chick gonads were observed: