198 



STRONGYLUS OVIS-PULMONALIS, Diesing. 



Plate XXXII. 



Portion of right lang, exhibiting an advanced stage of the hair lung- worm disease. 

 Tlie small dark spots show the youngest stages, the large patches show the disease 

 well advanced, while the large light spots are the oldest. A section cut across one 

 of these shows the depth at which the lung is affected. 



