The posterior neuropore form and the condensation of the forelimb bud becomes apparent near the 8th-12th somite pairs. A distinct condensation of the hind limb bud appears just at the end of the stage. The forebrain vesicle subdivides into telencephalic and diencephalic vesicles.

Absent: hindlimb bud, Rathke's pouch.

9.5 dpc (range 9-10.25)
21-29 somite pairs
Witschi Stage 17-19 (rat)
Carnegie Stage 12 (human - stage table)

All scale bars in microns.  
Click on an image for a larger version.