+-----------------------------+----------+-----------+--------+ | Organs affected. | Davaine. | Cobbold. | Total. | +-----------------------------+----------+-----------+--------+ | Liver | 165 | 161 | 326 | | Abdomen, including spleen | 26 | 45 | 71 | | Lungs | 40 | 22 | 62 | | Kidney and bladder | 30 | 23 | 53 | | Brain | 20 | 22 | 42 | | Bones | 17 | 16 | 33 | | Heart and pulmonary vessels | 12 | 13 | 25 | | Miscellaneous | 63 | 25 | 88 | +-----------------------------+----------+-----------+--------+ | Total | 373 | 327 | 700 | +-----------------------------+----------+-----------+--------+ In the main Davaine’s table and my own show a remarkable correspondency, as is seen in the numbers referring to hydatids of the liver, heart, and bones respectively. Where our results do not correspond the explanation of the discrepancy is sufficiently simple. The abdominal cases here credited as such in Davaine’s table are placed by him under _pelvis_, whilst the abdominal cases in my own table not only include the pelvic hydatids, but also two _spleen_ cases, and nineteen others from the peritoneum and intestines. As the facts here stand, the liver cases comprise nearly 46-1/2 per cent. In a large number of cases the entozoon has taken up its abode in organs of vital importance. If statisticians and officers of health would obtain an adequate conception of the fatal capabilities of parasites, they should consider these data. In 6 per cent. of all these cases the bladder worm has found its way into the brain, and of course proved fatal to the bearers; in about 3-1/2 per cent. more they took up their residence in the heart, also proving fatal; whilst of all the other cases put together I reckon that not less than 15 per cent. were concerned in bringing about the death of their hosts. I probably underrate the fatal capabilities of echinococcus disease when I express the conviction that hydatids prove fatal to 25 per cent. of all their human victims. The recently published analysis of 983 cases by Dr Albert Neisser affords similar results. Of these, 451 were referable to the liver, or 45·765 per cent. The other cases, reduced as above, show in the main a similar correspondency.