27 



LUMBRICUS 



5. Anterior portion of the alimentary canal as seen when freed of surrounding structures in the following 

 manner : cut through intestine just behind gizzard ; lift up the gizzard with forceps and working forward separate 

 the alimentary canal from the septa; pin down the alimentary canal as thus reflected: pharynx; oesophagus; 

 cesophageal pouches (segment 10) ; cesophageal glands (segments n and 12); crop; gizzard; intestine. Look 

 for the ovaries in segment 13 as the dissection is carried forward. 



