156 Lens-Formation from Strange Ectoderm 
Fig. 25. Experiment DL,,. Optic vesicle transplanted ventral to the otic 
vesicle. Embryo killed 4 days after the operation. Section through trans- 
planted eye and anterior end of lens showing where it was attached to the 
ectoderm. X 90 diameters. 
Fic. 26. Experiment DL,,. Section through transplanted eye, lens vesicle, 
and otie vesicle, showing how the latter and the mesenchyme have pushed 
the eye away from the ectoderm. X 90 diameters. 
Fic. 27. Experiment DL,,. Diagram of shape of lens in a plane at right 
angles to the sections. The shape of the lens corresponds to that of the 
optic cup cavity. X 90 diameters. 
Fig. 28. Experiment DL,,. Optic ‘vesicle transplanted caudo-ventral to 
the otic vesicle. Embryo killed 3 days after the operation. Section caudal 
to the otic capsule through irregular transplanted eye and lens vesicle. The 
lens vesicle is as large as the normal lens but not as far advanced in its 
differentiation. Compare with Fig. 13, which is similar to the normal lens 
in this experiment. x 90 diameters. 
Fig. 29. Experiment DL,,. Section through edge of transplanted eye, 
anterior end of lens and ectoderm. The latter shows place of origin of the 
lens, which probably has only recently separated from the ectoderm. X 180 
diameters. 
Fic. 30. Experiment DL,. Optic vesicle transplanted caudal to the otic 
vesicle. Embryo killed 3 days after the operation. Section through irregu- 
lar transplanted eye and lens vesicle, and medulla. The lens a little smaller 
than normal is close against the ectoderm but not attached to it. The normal 
lens is similar to the one in Fig. 21. ™X 90 diameters. 
Fig. 31. Experiment DL,. Optic vesicle transplanted caudal to otic 
vesicle. Embryo killed 3 days after the operation. Section through irregu- 
lar transplanted eye, lens, and medulla. The lens is slightly larger than 
normal but not as far advanced in its differentiation. It is entirely separate 
from the ectoderm. Normal lens as in Fig. 21. Xx 90 diameters. 
Fig. 32. Experiment DL,,. Optic vesicle transplanted caudal to the otic 
vesicle and dorsal to the anterior end of the Wolffian body. Embryo killed 
4 days after the operation. Section through transplanted eye and lens, 
medulla and anterior end of Wolffian body. The transplanted eye is of the 
same size, shape, and stage of differentiation as the normal one and the lens 
is also slightly larger but of the same stage of differentiation as the normal 
lens. Compare with Fig. 18, which is like the normal lens. X 90 diameters. 
