Representative examples of microbodies or peroxisomes are shown here at higher magnification. The plane of section may not include the nucleoid, as in the one at the top of the figure. The great majority of nucleoids are sectioned obliquely and show only a faint longitudinal striation. With patient examination of scores of micrographs, rare longitudinal and transverse sections can be found. In this way the lattice of the urate oxidase crystal in the rat peroxisome has been worked out in considerable detail. Magnification: 25,000x at 10 cm wide.