ETTPAGURTTS. 571 



Plate III. 



Fig. 17. Endophragnial system from the dorsal side. 

 The carapace and tergum of the last 

 thoracic somite have been removed and the 

 soft parts cleared away. x 11. 



Fig. 18. Endophragmal system. The plates in the 

 fifth somite viewed from behind. x 2. 



Fig. 19. Alimentary canal. Longitudinal section 

 through stomach to show the skeletal 

 structures. x 3|. 



Fig. 20. Diagrammatic trans, sect, of oesophagus to 

 show glands and constricted lumen 



Fig. 21. The stomach from the left side with the organs 

 opening into it. x 2\. 



Fig. 22. Transverse section through rectum, x 350. 



Fig. 23. Liver tubule in transverse section. x 103. 



Fig. 24. " Ferment" cells of liver, x 556. 



Fig. 25. Dissection from dorsal surface. The blood 

 system of the dorsal side in front of the 

 heart is shown. Vessels behind the heart 

 have been removed. The left mid-gut 

 caecum has been exposed and spread out. 

 The lobes of the digestive gland have been 

 separated to show the alimentary canal, 

 and the left lobe has been turned over to 

 show the testis imbedded in it. x 1-i. 



Plate IV. 



Fig. 26. The sternal artery and its branches from the 

 dorsal side. The descending portion of the 

 artery is turned to the right side. The 

 vessels to the pereiopods have been cut 

 short. x l-l 



