48 



3I()Kl'IIOLf)GY OF SPERMATOI'HYTES 



tain cmhrvos while still attaelied, a fact which wc have been 

 able to verify in our own experience. 



IV. THE EMBRYO 



Although the embryo of Ginkgo is exceptional among Gym- 

 nosperms, and of great interest, the details of its develo^mient 



Fig. 35. — Photographs of omhvyos ot" (Tiiihijo hilnha in various staijfos : ,-1, young 

 embryo; _^, oMlt ^lilgL^ ?^lio\ving >_'<ityli'ilnns ; c ', u still oh,U'r onihry<i, sliowing f;^'v- 

 cral yriuug leavi.-s ; /', a pru'tinn i.if a nearly luatiiix' liulirN'ci, with conspicuous resin 

 ducts in stiiii, <'Mty h.'iliins, and leaves; the Ijcakliku process su}iporting the reniuiiis 

 of the nucellus is slill visible. 



