OUR DOMESTICATED ANIMALS. 61 



attended with equally successful results. In both cases 

 the bladder worm occupied the right side of the brain. 

 The cases were especially instructive, as showing the folly 

 of waiting to take active measures until evidences of 

 absorption of the cranial bones indicate the precise seat 

 of the parasite ; and further, the particular case of the 

 heifer shows that, notwithstanding the setting in of the 

 severest cerebral symptoms consequent upon the opera- 

 tion, the animal may eventually make a good recovery 

 {Veterinarian for 1836, p. 115). . Mr. Youatt alludes, 

 without any precise reference, to a paper read before the 

 Medical Society of Toulouse, in which the author refers 

 to a practitioner " who had operated on cattle twelve times 

 for the extraction of the hydatid, and eight times out of 

 the twelve with perfect success ;" whilst the author of 

 the communication exhibited to the meeting two speci- 

 mens of the worm which he had himself removed from 

 the brain of a heifer eighteen months old {Veterinarian 

 for 1834, p. 575.) 



Of the other cases of interest collected from foreign 

 sources, we have that of Hering, who found no less 

 than seven imperfectly developed coenuri in the left 

 hemisphere of the brain of an old cow affected with 

 sturdy; that of Patellani, where hydatids in the right 

 ventricle of the cerebrum occasioned the death of a 

 two-year-old heifer; and that of Eamoser, where a 

 one-year-old heifer was trephined, but was slaughtered 

 the following day, when it was found that the worm 

 had occupied the right lateral ventricle. Lastly, in 

 the Veterinarian for 1865 (p. 357), Mr. J. Cooper 

 records three cases of coenurus occurring in calves. 

 In this connection I have further to remark that 

 the generally received notion that bladder worms and 



