TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



(/3) at the posterior end — Hepatic lobe, Supra- 

 hepatic lobe, Paragastric lobe, Oesophageal 



lobe. 

 The Main Vesicle ["sac vesical," Marchal] (M.V.) 



is situated below the anterior and outer corner of the 

 stomach and above the antennary gland, with which it is 

 connected at the posterior of the latter. On its ventral 

 side the main vesicle is connected with the ureter 

 immediately in front of the antennary gland. 



L^ 



Fig. 11. — Diagrammatic longitudinal section of the excretory system. 



E<p. 



= Epigastric lobe. 



M.V. 



= Main vesicle. 



Pro. 



= Progastric ,, 



Mus. 



= External adductor 



Par. 



= Paragastric ,, 





muscle of mandible. 



8.H. 



= Supra -hepatic ,, 



e.s. 



= End sac. 



Hep. 



= Hepatic ,, 



Lab. 



= Labyrinth. 



a.l.i. 



= Inner part of antero- 



Ur. 



= Ureter. 





lateral lobe. 



U. ay. 



= External aperture of 

 ureter. 



The Epigastric lobe (Fig. 57, e. lb., Text fig. 11, 

 Ep.) is the most obvious part of the bladder when dis- 

 secting the crab from above. It arises from the anterior 

 end of the Main Vesicle. It passes forwards and upwards 

 along the front wall of the fore-gut and turns back 

 along the dorsal wall, extending as far back as the 



