212 



Mr Shipley, Notes on a Dog's Heart [May 14, 



Sea islands of South Carolina) lost over thirty hunting dogs in two 

 or three years" from the same cause. 



The disease seems to be most common in China and Japan, 

 but it is also recorded in Brazil by Dr Silva Aranjo (1), and two 

 cases have been described in France, one at Montpellier by Caleb 

 and Pourquier (2), and the other by Gruby and Delafond (4) : the 

 present example comes from Fiji. The parasite has recently been 

 described by Janson (5) in the heart of a Japanese wolf, the only 

 instance on record of its occurrence in any other animal than 

 a dog. 



Most of the investigators who have recently worked at this 

 parasite have sought for some connection between the adult 

 worms found living in the right half of the heart and the large 

 pulmonary vessels, and the minute nematode larvae found so 

 commonly in the blood of the dog. These Haematozoa are of such 

 minute size as to be able to freely circulate in the capillary blood- 

 vessels ; the}' were first described by Dr Lewis, who found them in 

 about 25 per cent, of the dogs examined by him in Calcutta (8). 



Fig. A. View of the heart of a Dog infested with Filaria immitis, the right 

 ventricle and base of the pulmonary artery have been laid open, a, aorta, b. pul- 

 monary arteries, c, vena cava, d, right ventricle, e, appendix of left ventricle. 

 /, appendix of right auricle, x J 



Fig, B. One of the Filariae, a female, removed from the heart, to show its 

 length. Nat. size. 



