392 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



The Antero-lateral Cardiac Vlate&(cd.al.) are a pair of 

 thickened areas in the side walls of the stomach in front 

 of the postero-lateral cardiac plates, but they are not so 

 well denned as the latter. 



The Cardio-pyloric valve (c.p.v.) is the thickened 

 median portion of the posterior wall of the cardiac 

 fore-gut. Its upper end is invaginated into the floor 

 of the fore-gut so as to form an incomplete partition 

 between the cavities of the cardiac and pyloric regions of 

 the fore-gut. The top of the cardio-pyloric valve is richly 

 clothed with setae. 



Pyloric "Supporting Ossicles." 



In the dorsal wall of the pyloric fore-gut there are 

 three pairs of ossicles. 



The Anterior Mesopyloric Ossicles (a.mes) are a pair 

 of small ossicles lying immediately behind the pyloric 

 ossicle near the median dorsal line. 



The Posterior Mesopyloric Ossicles (p.mes.) are a pair 

 of small ossicles lying behind the anterior pair. 



The Uropyloric Ossicles {u.py.) are a pair of small 

 ossicles lying in the roof of the posterior part of the 

 pyloric region and immediately behind the posterior 

 mesopyloric ossicles. 



In the ventral ivall of the pyloric fore-gut the main 

 supporting ossicles are as follows : — 



The Antero-inferior Pyloric Ossicle (a.i.p.) is a 

 median plate shaped somewhat like a truncated triangle. 

 The base of the triangle points forwards and comes into 

 contact with the cardio-pyloric valve. This ossicle lies in 

 front of the inter-ampullary groove. 



The Pre-ampullary Ossicles are a pair of small plates. 

 Each lies at the side of the antero-inferior pyloric ossicle 

 and immediately in front of the pyloric ampulla. 



