Figure I-18

Iris stromal melanocytes. The melanin granules are enclosed by a membrane and are filled with melanoprotein. One cell has a well developed Golgi apparatus which surrounds a centriole (a). Part of a cilium is seen at (b). The cytoplasm is filamentous and contains rough-surfaced endoplasmic reticulum (c) and free ribosomes (d). (33,000.)