(Herpethotalpa caeca), digging lizard of skink family living in the same places. The body of erucotherium is about 40 cm long at the maximal thickness up to 7 cm. It is cylindrical, truncated on the back end and wedge-shaped from head end. Wool is short, dense and velvety, of grey, brown or reddish color. On head there is a flat corneous plate of yellowish color is advanced; it serves for protection of skin at digging. Forepaws of erucotherium are strongly reduced. Bones are very short; ulna is reduced and radius is thickened. Hand bones fuse and lose mobility. Only humeral and wrist joints keep partial mobility. From outside from forward limbs two large claws (3-rd and 4-th fingers) located on small lumps protrude – it is an only seen part of forepaws. Claws serve for fastening in the gro