FILARIA IN THE BLOOD. 151 



Spiroptera Sanguinolenta (Fllaria Sanguinolenta) (male 30 to 

 40 mm., female 60 to 70 mm., and about 0.5 mm. in width). 

 These have been found by Megnin, Raillet, and others in aneurism 

 of the aorta and (very rarely) in the blood. This parasite is occa- 

 sionally found in the walls of the stomach and the mucous mem- 

 brane of the oesophagus, and in the bronchial lymphatic glands. 

 Eggs and embryo are found in great numbers in the blood. The 

 intermediate host of the spiroptera, according to Grass!, is the 

 kitchen moth (blatta orientialis). When the spiroptera locates 

 itself in the walls of the oesophagus it causes more or less dis- 

 turbance of the system and rapid emaciation (Driessen, Little- 

 wood, and others). 



Strongylus Vasorum (Hcematozoon Subulatum) (male about 

 1.5 mm., female 1.5 to 2 mm., and 0.080 thick). According to 

 Laulanid, they are located in the right ventricle and the pulmo- 

 nary artery. The eggs reach the capillaries of the lungs through 

 the circulation, and from these the liberated embryos enter the 

 alveoli and bronchioles and form transparent nodules which look 

 like tuberculous masses. Leisering found sexually ripe parasites 

 in these nodules in the alveoli and also in the prostate and spongy 

 portion of the penis. Both observers found numerous embryos 

 in the blood. 



