186 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



cut in transverse section. No mucous membrane is 

 recognisable, and the whole wall is filled up with roundish 

 bodies, each of which appears on examination with a 

 moderately low power to be filled up with a homogeneous 

 material. These bodies are closely packed together, and 

 between them lie a few connective tissue fibres. Some 

 masses of disintegrated tissue lay between the folds which 

 may possibly have represented the disintegrated mucosa. 

 Fig. 3 represents a small portion of the same section under 

 a much higher magnification. Outside of all may be seen 

 a layer of peritoneum (Per.) and internal to this is a thin 

 longitudinal layer of plain muscle fibre (ML). Within 

 this layer of longitudinal muscle fibres is a la}^er of 

 circular fibres (M.c), also unstriated and about three 

 times the thickness of the former layer. Within this, 

 again is a layer of loose areolar tissue (S. muc.) from which 

 fibres pass through the thickness of the wall of the 

 intestine between the spherical bodies. 



The arrangement of the muscle layer is therefore 

 normal, and the foreign structures lie in the sub-mucosa. 

 Of the mucosa itself there is no definite trace. A delicate 

 sheet of connective tissue covers the free surface of the 

 folds. This is easily torn, and the little spherical bodies 

 can be readily dissociated. The}^ are perfectly spherical 

 in the fresh state, and have an average diameter of about 

 0'6 mm. The structure of a portion of one of these cysts 

 is shown in Fig. 3. There is a capsule (C.c), consisting 

 of an outer cuticular layer and an inner irregular layer, 

 which is fibrous in appearance, and apparently contains no 

 nuclei. Within this capsule the cyst is filled up by a 

 vast number of minute spore-like bodies. These are oval 

 in shape. They have a maximum diameter of about 5 ^. 

 They do not stain, and present no obvious internal 

 structure. 



