54 TROPICAL MEDICINE AND HYGIENE 



sub-connective tissue. They are feebly motile, worm- 

 like bodies, and 30 to 35 mm. in length and about 5 

 mm. in breadth. They show transverse wrinklings, not 

 true segmentations, and are flattened. 



In a British Guiana aboriginal, a large Sparganum, 

 8 in. long, was found in the connective tissue in the 

 posterior mediastinum. It differed from S. mansoni 

 in shape. As it is so much larger it is probably a distinct 

 species. 



A third species has been received from Uganda. 



No systematic disease is known to be associated with 

 these larval forms, but when in the subcutaneous connec- 

 tive tissue they may give rise to indolent tumours which 

 persist for prolonged periods. In rare cases suppuration 

 may occur and lead o the formation of an abscess. The 

 parasites have been known to be passed by the urethra. 



