Trematodes of the Soliped. 267 



of 1.5 cm., cylindroid, very thin, and with a cylindroid caudal 

 vesicle. Total length three to four inches. Head tetragonal and 

 furnished with a double row of hooklets. It has been found in 

 France (Chabert) and Germany (Reckleben). 



TREMATODKS OF THK SOIvIPFD. 



Three trematodes have been found in the intestines of solipeds, 

 the Ampkisioma Collinsi, the. Amphistoma Collinsi varietas Stan- 

 leyi and the Gastrodiscus Sonsinoi. 



Amphistoma of Collins. These are thick short worms of a 

 brick red color, having an anterior sucker surrounding the mouth 

 and a posterior sucker at the caudal end. In Hindostan they are 

 known as masuri, and multiply bj' thousands in the large intes- 

 tines, giving rise to indigestions and enteritis. The illness may 

 be recognized by the presence of the worms or their eggs in the 

 manure. As they must be developed through the characteristic 

 alternate generations of trematoids (see distomatosis) they may 

 be guarded against by avoiding infested water and pastures, or 

 destroyed by the liberal use of salt or vermifuges. 



Stanleyi variety of the Amphistoma of Collins is proijounced 

 by Cobbold to be essentially different. 



Gastrodiscus of Sonsini (gaster belly, diskos plate). This 

 parasite has a red flattened body in the form of a short ellipsis. 

 The back is smooth, the venter covered with about 200 papillary 

 suckers. The anterior end bears a conical papilla, 2 mm. in 

 length on the free end of which is the buccal sucker. The 

 posterior sucker is terminal and fastens the parasite to the mucosa. 

 The body is about 12 mm. in length, and 10 to 11 mm. in breadth. 

 It was discovered by Sonsini at Zagazig, near Suez, Egypt, in 

 horses dying of an enzootic, and has since been found in asses in 

 Senegal (Sarciron), and in mules in Guadaloupe (Guyot, Cousin) 

 and India (Giles). Collin has also found it in a zebra. 



Habitats. In horses it was found in the small and large intes- 

 tines in large numbers. In mules it was present in thousands in 

 pharynx, oesophagus, stomach, intestines and nasal fossae. 



Pathogenesis. Some of the victims died suddenly and others 

 only after a long period of anaemia and ill health. 



