60 



PERIPLANETA 



12. Dissection of Heart and Alimentary Canal. Remove the abdominal terga carefully 

 so that the heart lying within the pericardium may be seen in situ. Then remove also the thoracic 

 terga and free the alimentary canal from the adherent masses of the fat body and unravel its coils. 

 The larger tracheal branches should be cut with fine scissors. Right salivary gland; right salivary 

 receptacle ; oesophagus ; crop ; proventriculus ; pyloric caeca ; chylific ventricle ; Malpighian tubes, opening 

 into the short small intestine or ileum ; large intestine or colon ; rectum ; cerebral ganglion. 



13. Right salivary gland and receptacle removed with ducts, &c. entire. Under low power: acini; 

 tracheal tubes ; ducts ; nerves. This should be fixed in corrosive sublimate, stained in borax carmine, 

 and mounted in balsam. 



14. Portion of fatty body showing tracheae and fatty tissue. High power. 



