46 BLOOMER : ON THE BRITISH SPECIES OF THE GENUS SOLEN. 



EXPLANATION OF TLATES II AND III. 



Muscular system. x %. 



View from the right side showing aUmentary canal, 



&c. X 2. 

 View from the right side showing alimentary canal, 

 View from the right side showing alimentary canal, 



&c. X 2. 

 Transverse section of the animal showing the liver, 



stomach, oesophagus, musculature of the foot, 



&c. xiX- 

 Longitudinal section of the stomach, showing the 



internal structure of the left side. x 4. 

 Longitudinal section of the stomach, showing the 



internal structure of the right side, x 4. 

 Transverse section through intestine, showing the 



posterior portion of the ty-phlosole. x 12. 

 Transverse section through a convolution of the in- 

 testine showing the fold of the typhlosole. x 13. 

 Transverse section through the anterior portion of the 



caecum of the crystalline style and intestine, 



showing the columnar epithelial lining of the 



former, and the ciliated epithelial lining of the 



latter, x 45. 

 Transverse section of the stomach passing through the 



muscular papilla and small bile-duct. x 8. 

 Semi-diagrammatic view of the ventral portion of 



stomach, showing bile-ducts and their ramifica- 

 tions in the lobes of the liver. 

 Longitudinal section of the stomach showing the 



internal structure of the left side, x 4. 

 Longitudinal section of the stomach showing the 



internal structure of the right side. x 4. 

 Longitudinal section of the stomach showing the 



internal structure of the left side. x 3. 

 Longitudinal section of the stomach showing the 



internal structure of the right side. x 3. 



