NEMATOIDEA. 47 



A. Filaria Lentis. 



This has been found in the crystalline lens of the 

 eye in persons affected with cataract. 



B. Filaria of the Anterior Chamber. 



A nematoid worm observed by Quadri in the 

 aqueous humour of the anterior chamber of the eye. 



C. Filaria of the Orbit. 



This is a, variety of nematoid worm which, 

 according to Guyot, occurs beneath the conjunctiva 

 of the negroes in Congo and the Gaboon. 



Filaria Medinensis (The Guinea Worm). 



This is a cylindrical thread-hke worm, of a few 

 inches in length, which sometimes, however, attains 

 to the thickness of a quiQ, and may measure several 

 feet. The male of this species is imknown. The 

 female is of a whitish colour, and is marked by two 

 longitudinal lines, situated upon opposite sides of the 

 body ; the ova burst within its cavity. 



This worm only exists in people Hving in Africa, 

 India, or other hot counties, or who have recently 

 left those parts. It lives in the subcutaneous areolar 

 tissue of the hmbs, of the body, and of the head. 



Filaria Hominis Bronchialis 



This is a nematoid worm, about one inch in 

 length, which was observed by Treutler, who gave to 

 it the name of Hamularia Lymphatica, in con- 

 sequence of the two projecting hooks upon its imder 



