Filaria in the Blood of the, Domestic Dog. 237 



the dog, or in that of other animals, save so long as that fluid 

 possesses a constitution proper, and still unknown, to the 

 maintenance of the life of these hematozoa. 



15M, The filaria invisible to the naked eye injected alive, 

 along with the blood which transports them along the vessels 

 into the serous cavities, and the cellular tissue of healthy 

 dogs, were unable to remain alive in these two new domiciles. 



16M, A dog with vermiferous blood, with a female with 

 blood not vermiferous, produces offspring, of which those be- 

 longing to the race of the father have vermiferous blood, while 

 the others, pertaining to the race of the mother, have not. 



• Ylth^ A vermiferous-blooded female dog, produced with a 

 male dog without vermiferous blood, brings forth pups, of 

 which those taking after the race of the mother have worms 

 in their blood, while those resembling the father in race 

 have none. 



18M, A vermiferous-blooded female dog, with a male dog 

 equally so, has pups with worms in their blood, whether 

 these pups pertain to the race of the father or of the mother. 



19 M, The filaria in the blood of the pups have not been 

 discovered before they have reached the age of from five to 

 six months. The worms have continued to live in the blood 

 of these animals, which have now reached the age of four or 

 five years. 



20//i, Nineteen dogs, of which each had approximately 

 from 11,000 to about 224,000 microscopic filaria in its blood, 

 and also a dog having also in its blood six adult filaria, from 

 fourteen to twenty centimetres in length, have never been 

 seized with any special disease. Three dogs, however, hav- 

 ing, approximately, the first 17,000, the second 25,000, and 

 the third 112,000 microscopic filaria in the vital fluid, have 

 been struck with epileptic-like attacks. Two of these animals 

 died of the attacks ; in the third the attacks have ceased. 

 The health of this last dog has been perfect for more than a 

 year, although the same number of worms always exists in 

 the blood. Very numerous researches will yet be made on 

 this interesting subject.* 



* The author axmounees a new memoir on a strongyl us which lives in the 

 mesenteric arteries of the horse, and on the hematozoas, which live in the crow, 

 the frog, and in many species of fish, and in the lumbricus terrestris or earth- 

 worm. 



