JOURNAL OF MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATE XT, 



Illustrating Dr. Stirling's paper on the Changes produced 

 in the Lungs by the Embryos of Ollulanus tricuspis. 



Fig. 1. — Section of lung immediately under the pleura showing the 

 thickened pleura, a, and subjacent structures ; b, b are nodules (whose 

 structure has been purposely omitted) containing the empty capsules, c, 

 c, in which the embryos of ollulanus are encapsuled. d, T. S. of pul- 

 monary artery, with its middle coat greatly thickened. Obj. iv, oc. 3 

 Hartnack. 



Fig. 2. — A nodule of fig. 1, more highly magnified, with a worm, b, 

 within a capsule and a degenerated worm, a, within another ; d, compressed 

 and partly obliterated air-vesicles. 



Fig. 3. — Part of a nodule with, a, an empty cyst, b, degenerated worm 

 c, encapsuled ollulanus, d, reticular meshwork round cysts. 



Fig. 4. — Shows the same as fig. 3, with giant cells, a, within the mesh 

 work. 



Fig. 5. — Pulmonary artery opened into obliquely and showing the 

 greatly hypertrophied middle coat. 



