42Ô JOHN BEARD, 



Fig. 27. A glassy-looking group of degenerating transient ganglion- 

 cells lying near the skin on the level of the notochord in embr. No. 255, 

 (71 mm). Magnif. 500 X ii- 



Fig. 28. Four central ganglion-cells, one of which has formed a 

 nerve-fibre. To the latter three other ganglion-cells are applied. Embr. 

 No. 343. Magnif. 225 X f 



Fig. 29. A similar sub-epiblastic nerve from the same embryo. 

 Here there is also a ganglion-cell applied to the nerve still further 

 along and between epiblast and myotome. Magnif. (Skibekt 4 mm), 



225 XI- . . . 



Fig. 30. A sub-epiblastic nerve-fibre given off by a central ganglion- 

 cell, but here ganglion-cells are applied to each side of the fibre. In other 

 sections the nerve is continued onwards between myotome and epiblast. 

 Embr. No. 343. Magnif. 225 X I- 



Fig. 31. A bipolar ganglion-cell with one process sub-epiblastic, the 

 other applied to a central ganglion-cell and process; embr. and magnif. 

 as before. 



Fig. 32. Shows two sub-epiblastic nerves with applied ganglion- 

 cells. A combination of three sections. Embr. No. 164, 10 mm, 101 

 somites. Magnif. 225 X I- 



Fig. 33. A section of part of the spinal cord of a very much older 

 embryo (No. 263, 12,25 cm), to show a ganglion-cell stretching across 

 the posterior fissure. Magnif. 140 X f- 



Fig. 34. A transient ganglion-cell and nerve lying between the 

 lateral line [I. T) and myotome {m.p) in an embryo (No. 245) of 54 mm. 

 Magnif. 225 X I- 



Fig. 35. A bipolar transient ganglion-cell lying on the cells of 

 the spinal ganglion {sp. g), with nerve processes as in Fig. 31. Embr. 

 No. 48, 20 mm. Magnif. 225 X I- 



Fig. 36. Ex-centric groups of ganglion-cells, in addition to those 

 lying in the centre, with nerve-fibres and applied "nerve-cells" and 

 capsule-cells. Embr. 209, 34 mm. Magnif. 225 X i 



Fig. 37. A combination of several sections from the same embryo, 

 showing the central cells, on the right side a sub-epiblastic nerve with 

 many applied ganglion-cells, and on the left a .similar nerve with applied 

 "nerve- cells". Magnif. as before. 



Fig, 38. A transient ganglion-cell lying in the apex of the myo- 

 tome with its nerve process extending towards the centre. Embryo 

 No. 192, 22 mm. Magnif. 500 X i 



Fig. 39. A combination of two sections from the same embryo. 

 The figure shows a curious group of transient ganglion-cells, resting on 

 the apex of a spinal ganglion. Nerve processes of two of the former, 

 as well as of a central cell, are shown. Magnif. as before. 



Fig. 40. In addition to the central cells, the figure shows a group 

 of ganglion-cells, provided with capsule cells, lying in the mesoderm. 

 In other sections a sub-epiblastic nerve passed off from this group. 

 Embr. No. 237, 45 mm. Magnif. 225 X f- 



