STRUCTURE OF GLANDULAR VENTRICLE OF SYLLIS. 479 
Summary of results. 
1, The part of the alimentary canal of Syllis previously 
regarded as a glandular ventricle is in reality of the nature of 
a gizzard, and contains no glands in its walls. 
2. The structures supposed hitherto to be glands are hollow 
columns of striated muscle, which in Syllis a isof a strongly 
marked type. 
3. The muscular elements of the organ retain an embryonic 
character, containing a polynucleated core. 
4. The fibrils of the muscle are seen in Syllis 6 to be 
formed by the linear coalescence of rows of the large rounded 
granules of which the main substance of the core is composed. 
