EARTHWORM 



237 



ProstorVi'um 

 Moufh 

 /Serves 

 Buccal cav/^y 



Suprapharyry^eal 

 Phary/^X 



Hecfrfs 



Fsophagfecf/ 

 pouch 



Ccr/c/feroa3 

 g/anc/s 



Esophagus 

 Crop 



Gizzarcf 



/n-f-es-f-/'/^e 



Dorsa/ b/ood 

 vesse/ 



Fig. 146. — Diagrammatic representation of the anterior part of the alimentary canal 

 of an earthworm. Based upon a preserved specimen. The blood vessels are shown in 

 solid black. Segments numbered in roman. 



XVI-I 

 xvir- 

 xvm- 



-Nephrostome ^^Nephn'p/i'opore 

 Intersex werjfc*/ 



Collecting 

 regi/on 



Fig. 147. — Diagrammatic view of the nephridium of an earthworm. In the body this 

 is invested with soft connective tissue and the loops of the tubule are crowded together. 

 Highly magnified. 



