OUR DOMESTICATED ANIMALS. 57 



echinococcus) . In this country Mr. Edward Nettleship 

 succeeded in verifying the results thus obtained abroad. 

 My own prior experiments, however, from causes else- 

 where explained, yielded only negative results. It must 

 be added that the history of the development of this 

 entozoon is one of remarkable interest ; but (partly from 

 the extent of the subject, and partly from its more obvious 

 importance in connection with the parasitism of dogs and 

 sheep) I purposely omit further details on this score for 

 the present. 



Hydatids — apart from those producing u gid," or sturdy 

 — are not merely a cause of disease in cattle, but also 

 occasionally of death. In this connection it is much to 

 be regretted that so few of the many cases occurring 

 in veterinary practice are placed on record. In the 

 Veterinarian for 1838, Mr. J. Stoddard gives the case of a 

 cow where the liver was, after death, found to be "occupied 

 with numerous hydatids;" yet it does not appear certain 

 that the extensive inflammatory action, which proved the 

 immediate cause of the animal's death, had its origin from 

 the parasites. In a somewhat similar case, however, 

 recorded by Mr. J. Barnett in the same journal for 1865, 

 there can be no doubt that the death of the bovine patient 

 resulted from the injurious action of the entozoa. In this 

 instructive case the liver contained multitudes of echino- 

 coccus vesicles, varying in size " from that of a marble to 

 a small egg." The quantity of pale-coloured fluid con- 

 tained in the smaller and larger vesicles collectively 

 amounted, we are told, to " upwards of two gallons." 

 A third case of a similar kind, seen by Mr. Meek, is also 

 alluded to in Mr. Barnett's communication. 



It is well known to surgeons, helminthologists, and 

 others, that not merely the soft tissues, but even the 



