PLATE 23 

 Teredo navalis L. 



Fig. 6. Interior of the left half of the stomach, the part not shown in plate 22, 

 figure 1. The arrow passes through the orifice of the sac of the crystalline style to the 

 gastric shield. 



Fig. 7. Lateral, external view of the stomach from the left. 



Fig. S. Lateral, external view of the stomach from the right. 



Anterior liver. 



Appendix of the sac of the crystalline 



style. 

 Caecum. 

 Caecal orifice. 

 Ciliated ridge. 

 Region of the coiled typhlosole of the 



intestine. 

 Dorsal caecum. 

 Gastro-intestinal typhlosole. 

 Gastric shield. 



p.l. 

 p.st. 



Gastric typhlosole. 

 Intestine. 

 Lateral pouch. 

 Mouth. 



Pylo 



Posterior liver. 



Posterior, pyloric region of the stomach. 



Supraoesophageal artery. 



Sac of the crystalline style. 



Ventral liver. 



[472] 



