A laboratory manual of vertebrate embryology part i anatomy of frog embryos jtana tnpiervi stages after shumway 1940 no name age in hours at 18 cent length in mm 1 unfertilised egg 0 17 2 fertilised egg gray crescent 1 aeuroe 3 two cell 35 aeuroe 4 four cell 45 5 eight cell 57 6 sixteen cell 65 7. A laboratory manual of vertebrate embryology part ii anatomy of chick embryos the germ cells and fertilization the ovum the egg cell or ovum of the hen is the portion of the egg usually referred to as the yolk it consists of a minute island of cytoplasm the germ spot or germinal disc floating on the yolk which is a large ball of stored up food material the whole egg cell is enclosed in . Laboratory manuals laboratory manuals additional physical format online version adamstone frank bolton 1896 laboratory manual of vertebrate embryology new york wiley 1954 ocolc595293505 document type book all authors contributors f b adamstone waldo shumway. Vertebrate embryology a laboratory manual by richard m eakin author march 1978 third edition paperback 3195 gbp2700 title details rights available worldwide pages 284 isbn 9780520035935 trim size 55 x 85. A laboratory manual of vertebrate embryology part iii anatomy of the 10 mm pig 10 mm pig embryo external form the 10 mm pig is a much larger and more complicated embryo than the 72 hour chick last studied and it has not only begun to take on its final external form but it has also developed the primordia of nearly all the organs and organ systems