THE TANGANYIKA PROBLEM. 



225 



and interesting, being divided into an anterior and a 

 posterior chamber. The oesophagus enters on the left 

 almost at the constriction which separates these two 

 stomachic chambers, the intestine leaving from the same 

 region below. The posterior chamber of the stomach con- 

 tains a large valvular fold, and the bile-duct opens into it 

 from beneath. The walls of the posterior stomachic cham- 

 ber, like those of most gastropods, are thin, but beyond the 



-cfe.^ 





*W7V f 



Fig. 6. — Section of one of the otocysts of 

 Typhobia horei ( X 206). 



constriction which separates the two stomachic chambers 

 one from another, the walls of the anterior chamber are 

 found to be very thick, and the chamber itself contains 

 a long, clear, transparent body, loose in the cavity, the 

 so-called crystalline style. The kidney is situated be- 

 hind and around the heart, and the digestive gland 

 occupies the greater part of the space in the upper coils 

 of the body. The heart consists of an auricle receiving 



