South-east Cheval. 

 East Cheval. 

 North-east Cheval. 

 Periya Paar Kerrai. 

 North-west Cheval. 

 West Cheval. 

 S.W. Cheval. 



,, ,, (another 



locality). 

 South-east Cheval. 



Dutch Modragam. 

 Muttuvaratu Paar. 

 South-east Cheval. 



North-east ,, 

 Periya Paar Kerrai. 

 North Cheval. 

 North-east Cheval. 



Thus in all 41 individuals had the adductor muscle infested by this Nematode 

 out of a total of 542 pearl oysters dissected specially in search of this parasite. In 

 one of those of February 4th, the worm lay upon the surface of the muscle on the 

 ventral aspect. In only one instance were two Nematodes found in the same muscle- 



never a greater number. 



In the intestine of Tceniura melanospilos was found a fragment of a Nematode 

 which was undeterminable, and a number of the species Ascaris pastinacce, Eud., 

 which inhabits also Trygon jiastinaca, Cuv. 



