Figure 1.

Location of meningeal pigment cells as they appear during dissection. (A) Dorsal view of the calvarium after it has been removed, revealing the brain. (B) A dorsal view of the brain after it has been removed from the skull. Melanocytes can be found on top of the olfactory bulb anteriorly (red arrow), between the olfactory bulb and the cortex (blue arrow) and between the cerebellum and cortex posteriorly (green arrow). (C) The ventral aspect of the brain showing pigment cells underneath the olfactory bulb (red arrow). (D) Dorsal view of the cranial floor of the skull after the brain has been removed. Pigmented cells can be seen posteriorly surrounding the pterygopalatine artery where it branches off into the middle meningeal artery lateral to the trigeminal ganglion on either side (green arrow). Anteriorly, pigment cells can be found around the optic and trigeminal nerves where they exit the skull (red arrow). At the bottom of the image are two red lines which indicate where the skull was cut to determine whether inner ear melanocytes were present or not. In all panels, up is anterior and down posterior. Ct, cortex; ob, olfactory bulb; cb, cerebellum; tg, trigeminal ganglion.