Scanning electron microscopic study of blood cell surfaces of the middle asian tortoise, Testudo horsfieldi.

The micromorphology and surface topography of spleen cells of the Middle Asian tortoise, Testudo horsfieldi, have been examined by scanning electron microscopy. Spleen cells comprise a population with surface characteristics similar to counterparts in mammalian spleen except for an, as yet undescribed, lymphocyte which is designated as lamellar type on the basis of its surface contours.