179 



DISCUSSION". 



Dr. Whittell thouglit from the description of symptoms 

 given by Mr. Dixon that the disease was not caused by hydatids 

 but by a species of Coetiurus in its larval condition, and this did 

 not affect man. 



Dr. GrAEDNER was also of opinion that the disease in the 

 sheep was caused by Coenurus cerehralis. As this parasite was 

 derived as well from the ova of a tape-w^orm of a dog {Tcenia 

 coenurus) the fact of the disease being less prevalent when the 

 sheep were paddocked than when they were shepherded, was as 

 easily explainable as though the Tcsnia had been Tcenia ecJiino- 

 coccus. Furthermore, the brain was a rare locality for the 

 " hydatid," but a favourite one for the Coenurus. 



Prof. Tate suggested that if hydatids were existent in the 

 brain of a sheep the symptoms would be similar. 



Mr. Dixon said that the cysts observed by him agreed with 

 the descriptions given by medical authorities. 



Oedinaet Meeting, Maech 6, 1883. 



C. Todd, C.M.G-., &c., President, in the chair. 



Ballot. — C. Bowyer-Smythe, H. Gill, Eev. W. Howchin, and 

 H. T. L. Browne were elected Fellows. 



Exhibits. — Professor Tate, F.G-.S., &c., exhibited a dead 

 specimen of the mollusc {Argonauta tuherculosa) , popularly 

 known as the "paper-nautilus," forwarded by Mrs. Richards 

 from Flinders Island. Also the tuber of Microstemma tuherosum 

 sent by Inspector Foelsche, Corresponding Member, from Pal- 

 merston. Also a new species of Compositae, JEpalfes Tatei. 



Dr. Dayies Thomas read some further observations on 

 hydatids. 



Prof. Tate read a " Eecord of new plants and of new 

 Localities for Eare Plants," by himself. 



Mr. J. G. 0. Teppee, F.L.S., sent some "Botanical Notes." 



Mr. D. B. Adamson read a paper upon some experiments 

 made by him upon Carre's di-electric induction machine, and 

 performed some experiments. 



Chaeles Todd, C.M.G., &c., announced that he had 

 been very successful in taking observations of the transit of 

 Venus, when at Went worth. 



Prof. Tate, F.G.S., &c., mentioned that the rules of the 

 Society did not provide for the loan of books out of the 

 library, and on behalf of the Council requested permission to 

 make by-laws for regulating such loans. This was granted. 



Prof. Tate, F.G.S., &c., &c., read some "Notes upon Geo- 



