Table 1. Summary of observations of major visual white matter tracts in 3D-PLI data of the vervet monkey brain.

Tract	Definition and trajectory	Origins/terminations visible in 3D-PLI data (figure number)
SS	Parasagittally oriented white matter tract in posterior part of brain (Sachs, 1892). Thought to include thalamo-cortical fibers (Schmahmann and Pandya, 2006).	Includes fibers between LGN and V1 (Figures 2, 3 and 10). Also includes other fibers with termination/origin in lateral pulvinar (Figure 2) and V2v (Figure 10). Other fibers turning into the SS also described previously (Schmahmann and Pandya, 2006).
ILF	White matter tract travelling along lateral gyri in the temporal lobe (Burdach, 1822). Composes major associative connection between occipital and temporal lobe (Catani et al., 2003).	Can be divided into fibers dorsal to the SS and those ventral to the SS (Figures 3–4). At anterior end, both dorsal and ventral fibers terminate at TE (Figures 3–4). Posterior termination of the ventral ILF appears at V3v, V4v and TEO (Figure 4). At posterior end, ventral fibers merged with VOF fibers (Figure 4).
VOF	Association white matter tract located laterally adjacent to the SS and connecting dorsal and ventral occipital cortex (Yeatman et al., 2014).	Dorsal terminations found at V3d, V3A, V4d, V4d and DP (Figures 3–4 and 7–8). Ventral terminations found at V3v, V4v and TEO (Figure 7 and Figure 7—figure supplement 1). Some fibers merged with ventral ILF fibers near ventral extrastriate cortex (Figure 4).
dOB	Association white matter tract located between the SS and annectant gyrus (Schmahmann and Pandya, 2006).	Posterior termination in V3A (Figure 9). Connects medial and lateral parts of cortex in the intraparietal sulcus. Difficult to precisely identify all dOB terminations since its merges with VOF and U-fibers (Figure 8).
tapetum	Slender caudal and lateral component of the corpus callosum (Burdach, 1822; Clarke and Miklossy, 1990; Schmahmann and Pandya, 2007).	Anterior origin is splenium corporis callosi (Figure 11). Posterior terminations were not always identifiable, but may terminate in the border tuft region or area prostriata (Figures 8–9 and 11).
stratum calcarinum	U-fiber layer of the calcarine sulcus (Déjerine, 1895).	Connects dorsal and ventral lips of calcarine sulcus, which correspond to border tuft region and area prostriata (Figures 7–11).