Stereopictures of internal structures and trophi of rotifers

SEM pictures were taken before and after tilting the specimen mount with th e object at angles of 10-15 degrees. Observing pairs of the resulting photo graphs through a suitable stereoscope (or by simpler techniques) gives a th ree-dimensional view of the object which assists in the interpretation of m orphological structures. Examples are presented that show details of intern al structures in the region between wheel organ and mastax of Brachionus pl icatilis and compare the structure of trophi in different rotifers.