454 Dr. J. D. Thomas. Taenia Echinococcus in [June 18, 



The fluid was allowed to stand in a decantation glass, protected 

 from dust by a glass shade, for a couple of hours, and the bulk of the 

 supernatant fluid was tben poured off. Three and a half hours after 

 •its removal from the man, about half the residue, containing many 

 groups of scolices, was poured down the throat of one of the dogs ; 

 most of it seemed to be swallowed, but some was coughed up. Milk 

 was then poured down the dog's throat, and afterwards a further 

 quantity of milk was supplied in a vessel ; this was readily lapped by 

 the animal. 



On the next day, October 17th (about sixteen hours after the fluid 

 was obtained), most of the remaining scolices were administered, 

 being poured down the throat of the dog in about an ounce of their 

 native fluid. As before, a supply of milk followed, this time with the 

 addition of breadsops. Twenty-nine hours after the removal of the 

 hydatid fluid, I examined some of the contained scolices, and found a 

 considerable portion of them alive and moving actively on the hot 

 stage (temp. 100° F.). On November 18th (thirty-two days after 

 the feeding) the dog was killed with chloroform, and the small intes- 

 tine and stomach were carefully examined by Dr. Whittell and 

 myself. No appearance of Taenia echinococcus could be recognised 

 on the lining of the intestine, but a great number of Taenia cumu- 

 merina were noticed, partly in the lower portions of the upper half of 

 the small intestine, and in greater numbers in the lower half. No 

 round worms could be found. The lining membrane was washed 

 with warm water, and the washings were then carefully examined. 



In the washings of the upper half we found about 100 specimens of 

 Taenia echinococcus, out of which about eighty complete worms were 

 collected ; many terminal points also were seen. In the washings of 

 the lower half of the bowel, I found six complete specimens. These 

 Taenia were evidently unripe, and none of them showed four points, 

 or indeed proglottides containing ripe hard- shelled eggs. Many of 

 them had three segments, including the head, but not a few consisted 

 only of a head, unsegmented neck, and one terminal proglottis. 



In the terminal joint, the cirrus, cirrus-sac, and coiled vas deferens 

 were seen, and in some cases faint indications of egg-formation. The 

 head showed the usual suckers and rostellum, and in several cases a 

 double circlet of hooklets. 



The worms varied from about to \ inch (one to one and a half 

 lines) in length, and were so fragile that a portion of the brood, 

 carried carefully in a bottle containing camphor water for a distance 

 of a few miles, were found by Dr. Whittell to be, without a single 

 exception, broken into separate segments. 



The circlets of hooks were usually absent or incomplete, probably 

 in consequence of mechanical injury, but in one instance a complete 

 crown was found. 



