Fig. 4. Representative digital images of the hyaloid vessels on the vitrad surface of the retina of two species of nototheniid fishes (+Hb). (A) Trematomus hansoni; (B) Notothenia coriiceps. The cornea, iris, lens and vitreous body were removed to allow viewing of the hyaloid vasculature, here exemplifying an intermediate and a sparse radial pattern, respectively. Blood vessels were traced using a digitizing tablet. Scale bars, 3 mm.