224 



THE TANGANYIKA PROBLEM. 



skirt. The snout is short, wrinkled, and pigmented, and 

 the eyes, which possess lenses, are situated on a long 

 tapering tentacle on each side of the head. The buccal 

 mass in Ty phobia is not large, and the rasping teeth which 

 are arranged in innumerable transverse rows on the toneue 

 present the characteristic elements represented in Fig. 4. 



Fig. 5. — Semi diagram of the anatomy of Typhobia horei. 

 The Mantle laid open and the digestive tube shaded. 

 The ova are seen in the brood pouch, Bp. 



where the lateral teeth on the left side, and the median 

 tooth are shown. Following the alimentary canal, the 

 buccal mass is succeeded by a long narrow oesophagus, 

 which receives the ducts from two very simple, pouch-like 

 salivary glands, and passes quite straight back into the 

 stomach. The stomach in Typhobia is very characteristic 



