Abstract
The fine structure of spermatozoa of the European mole ( Talpa europaea ) has been studied. The nucleus is surrounded by an exceptionally large acrosome: at the tip of the nucleus the subacrosomal space forms an asymmetric rostral projection containing a rod of dense substance. A material with paracrystalline organization was often observed in the nuclear protrusion. A bilateral symmetry can be detected in the middle piece, owing to the peculiar arrangement of the outer dense fibers. Similarity of some peculiar characteristics in shrews and in moles is discussed.
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