CESTODA 139 



Referring, in the first instance, to the hydatids of animals 

 that have the same mode of origin and exhibit the same general 

 characteristics as those found in man, I notice that four of 

 the metropolitan museums exhibit nine examples of liver Echi- 

 nococci. The Hunterian Collection shows specimens of this 

 kind from the pig, monkey, zebra, and lion. The museum at 

 St Bartholomew's Hospital contains two examples from the pig 

 and one from a cow ; whilst the animal liver-hydatids preserved 

 in the King's College and Guy's Museums, respectively, are from 

 the pig and sheep. That from the latter is partly calcified. 

 Respecting animal hydatids affecting the lungs, the Cambridge 

 Museum exhibits a simple acephalocyst from a monkey, and 

 the Guy's Hospital Museum shows a pulmonary hydatid from 

 the kangaroo. In the museum at Oxford, Dr Acland's 

 (pathological) department shows a preparation of " one large 

 echinococcus cyst from the abdomen of a baboon," whilst Dr 

 Rolleston's department (anatomical) displays the echinococcus 

 itself from the " cavity of the abdomen of the same 

 animal." The collection also contains a variety of other 

 bladder worms from different animals. The Hunterian Museum, 

 Lincoln's Inn, exhibits four or five alleged examples of hydatids 

 from the kidney of the sheep, besides another from the spleen. 

 Some of these are of very doubtful character. A cystic kidney 

 from the sheep, preserved in the London Hospital Museum, and 

 originally supposed to have been due to hydatids, is (as hinted 

 in the MS. catalogue) certainly not of parasitic origin. In 

 regard to the occurrence of hydatids in the heart of animals the 

 Hunterian series shows two good examples from cattle,, whilst 

 the collection at University College exhibits one taken from the 

 wall of the left ventricle of a sow. This was presented by Dr 

 Elliotson. 



In the museum of the Royal Veterinary College there are a 

 number of excellent preparations of true hydatids taken from 

 various animals, especially from cattle, swine, and sheep ; and 

 there are also many kinds of bladder worms which, though 

 often called " hydatid " by veterinarians, have a totally different 

 origin from that of the true Echinococci. The so-called gid- 

 hydatids (Ccenuri) and slender-necked hydatids (Oysticercus 

 tenuicollis) are of this description. Specimens of the poly- 

 cephalous brain hydatid, or Ccenurus, also exist in the museums 

 connected with St Bartholomew's, Guy's, and St Thomas's 

 Hospital Medical Colleges, as well as in both the anatomical 



