TMmA ECHINOCOCOUS. 277 



From the variety of headings under wliich such cases are usually 

 referred to in the indices of these works, I do not pretend to say 

 that I may not have overlooked one or two valuable papers ; whilst 

 the occasional absence from our libraries of one or more volumes 

 of certain serials, as well as other interfering circumstances, have 

 prevented my becoming acquainted with all the cases which have 

 been pubhshed in our journals within the last thirty years. Some 

 few of these cases are included in the extended list given by 

 Davaine ; but the independent value of the record will not, I believe, 

 be materially lessened on that account. My analysis of these cases 

 stands as follows :— Liver, 51 ; abdomen (including those found in 

 the peritoneal cavity, in the omentum, and in the intestinal canal), 

 19 ; brain, 16 ; heart, 8 ; lungs, 8 ; kidneys, 4 ; bladder and urine, 

 3 ; pelvic cavity, 3 ; tibia, 7 ; scapula, 1 ; frontal bone, 1 ; anterior 

 condyloid foramen, 1 ; orbit, 1 ; spinal cord, 1 ; neck, 1 ; breast 

 and arm (subcutaneous), 1 ; loin, 1 ; thigh, 1 ; under biceps 

 femoris, 1 ; in biceps humeri and temporal muscles, 1 ; ovary, 1 ; 

 blood, 1 ; pericardium, 1 ; diaphragm, 1 ; in a foetus, 1. I think 

 this analysis is tolerably correct, the only really doubtful figures 

 being those indicating the number of the cases of lung and 

 abdominal hydatids respectively. Where, in cases of recovery, 

 some hydatids have been expectorated and others have passed 

 per anum, it was, of course, impossible to determine whether or 

 no these parasites had their primary seat in the liver. But, per- 

 haps, the most interesting fact which I have noted in respect of 

 these cases, lies in the circumstance that no less than thirty-five 

 of them were cases in which the patients recovered. Four of these 

 were complete natural cures ; two others being also temporarily 

 cured in the same way. All the rest were cured by surgical 

 operations, but I fear only two of them were correctly diagnosed 

 (i.e. with certainty) prior to the employment of the knife or 

 trochar. Most of them were regarded as tumours or abscesses 

 until the escape of their contents (from incision) had revealed their 

 true character. 



