FIG. 14. A photograph of a section through the cortex of the cerebrum in an early stage of development of the nervous system, showing segments of a number of neurones, including the thickened part, the so-called cell-body of the neurone. After Starr, Plate 42. X150 Diameters.

FIG. 15. A photograph of a section through a convolution of the cerebrum in an early stage of development of the nervous system. The black mat at the top of the photograph represents a dense aggregation of the frayed-out ends of many neurones; in the rest of the photograph are seen clearly segments of many separate neurones, with the thickened parts of about thirty in a nearly horizontal line. 33. X 20 Diameters.

After Starr, 62, Plate

FIG. 16. A photograph of a section through the cortex of the cerebrum, showing short segments of a number of neurones, including in many cases the thickened part, the so-called cell-body of the neurone. After Starr, 67, Plate 40. X120 Diameters.