456 The Animal Kingdom 



segments 3 to 5. Numerous small white external muscle fibers lead 

 from the surface of the pharynx to the body wall. A short esophagus 

 (segments 6 to 14) leads from the pharynx to the crop (segments 15 and 

 16). On either side of the esophagus in segment 10 is a pair of small 

 lateral caeca; in segments 11 and 12 are pairs of calciferous glands. 



PBOSTOMIUM 



BUCCAL CAVITY. 



SUPRAPHARYNGEAL 

 GANGUON 



PCRISTOMIUM 



CIRCUMPHARYNOEAL 

 CONNECTIVE 



SEMINAL RECEPTACLE 



SEMINAL VESICLE 



STOMACH-INTESTINE 



VENTRAL NERVE CORD. 



ESOPHAGUS 



DORSAL BLOOD 

 VESSEL 



Fig. 147. — Internal anatomy of the earthworm, Luynbricus. 



