NEMATOIDEA. 49 



which has been observed in man is the Strongylus 

 Gigas, which is the largest of the nematoid worms. 



It exists more frequently in the dog, the wolf, 

 the horse, and some other animals. Its habitat is 

 the kidney, and it has occasionally been found in the 

 bladder, and in the sub-peritoneal areolar tissue, &c. 

 Its colour, which is of a reddish tint, is probably due 

 to the fluid in which it is immersed. 



Only two or three strongyli usually exist in the 

 same individual. 



Strongylus Longevaginatus. (Diesing). 



A small nematoid worm, of which several speci- 

 mens were observed in the substance of the lung of a 

 child six years old. The disease of which the child 

 died is not recorded. 



Genus Dactylius. (Curling). 



In a case which came under the notice of 

 Mr. Curling, in 1839, a young girl passed, upon 

 several occasions, a considerable number of small 

 worms with the urine. Some specimens of this 

 entozoon, to which the name of Dactylius Aculeatus 

 has been given, were examined by Mr. Curling, con- 

 jointly with Professors Owen and Quekett. 



According to their description, this worm is of a 

 light colour, cylindrical in form, and annulated, and 

 tapering slightly towards either extremity. The 

 female measures about four-fifths of an inch in 

 length ; the male, as is the caSe with most nematoid 

 worms, is much smaller, being only about two-fifths 



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