The ultrastructure of the adipose tissue connective tissue, mesothelium and milky spots fo:.minp the greater crnentum of sheep and goats was studied.The mixture of connective tissue fibers and adipose tissue is arranged in submesothelial, marginal, and central layers. -The mesothelial cells are covered by a surface coat and arc characterized by numerous microvilli and vesicles. The number of milky spots varies greatly. They are commonly found on the surface of the omentum and are covered by modified mesorhelial cells; their interior contains macrophages and lymphoid cells.

Light and electron microscopic investigations on the Mg⁺⁺- and Ca⁺⁺-activated ATPase of sheep and goat dorsal root ganglion have been carried out. Reaction products occur on plasma membranes and interfaces between neurons and sheath cells, between adjacent sheath cells and on the surface of unmyelinated fibers. Cytoplasmic protrusions of ganglion cells and numerous surface increasing invaginations of sheath membranes form close connections between neurons and sheath cells.