:30 Georgina Sweet: 



O. gihsoni further in the thicker head of the male, the thinner 

 head and tail of the female, and the generally longer oesophagus in 

 both. 



4. The limitations of these species appear to he geographical 

 lather than otherwise: — thus. 0. gutturosa is characteristic of 

 Northern Africa, presumably in Bos taurus; 0. indica is found in 

 Bos indicus*- in the peninsula of India, and 0. gibsoni in Bos 

 indicus in the Malay Peninsula, and as a very variable form in 

 Bos taurus in Australia, and most probably the Malay Archipelago. 

 The occurrence of such nodule-forming worms is probably much 

 ■wider than is at present suspected. 



5. The evidence supports the theory that worm-nodules were 

 introduced probably by cattle from the Malay Archipelago, and not 

 by cattle from India, and therefore almost certainly they came in 

 the cattle brought from Coepang in Timor in 1824 pr 1840. 



6. The Buffalo cannot be implicated so far. 



7. The original parasite and its original host are probably to be 

 nought for in the Indo-Malayan gaur or wild ox (Bos (Bibos) 

 gaum*), from which also 0. gutturosa may be derived indirectly 

 through 0. indica. 



8. No evidence is forthcoming as to the life-history, from any 

 source. 



In conclusion, I wish to express my thanks to Professor Baldwin 

 Spencer and to Professor H. A. Woodruff for permission to use their 

 laboratories in this University for the purpose of this research, and 

 to them and to Dr. T. S. Hall and Mr. H. K. Seddon, for their kind 

 interest and ready help. 



ADDENDUM 1. 



Since the foregoing report was presented, I have received a 

 further supply of nodules (a) from cattle (Bos indicus) from 

 Southern Siam, sent by Mr. S. L. Symonds from Serembam, F.M.S., 

 and (b) from 3 Indian buffaloes (Bos bubedis) from Mr. C. W. 

 Wilson, from Aligarh, United Provinces, India. 



(a) These are typical nodules of 0. gibsoni, with the characteristic 

 dense fibrous capsule much thicker than in 0. indica. In one nodule 

 no male could be found, although the female contained fully de- 

 veloped eggs and larvae. Caseation was considerably advanced in 

 parts of this nodule, and neither the head nor the tail of the 

 female could be found. In the second nodule there was much 



Addendum 1, re its presence in buffalo in India. 



