TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATE X, 
Illustrating Dr. Bastian^s paper on Pacchionian Bodies. 
1. — Different forms of Pacchionian bodies seen on surface of arachnoid. 
2. — Appearance of epithelial covering of Pacchionian body. 
3. — Tesselated epithelial cells from surface of pericardium. 
4. — Solitary cells of same kind from Paccliionian body. 
5. — Homogeneous, structureless network of tissue from surface of same 
body. 
a. Spiral elastic tissue. 
6. More highly developed tissue of same kind, presenting slight traces of 
fibrillation. 
7. Interlacing bundles of fibrous tissue fully developed from more mature 
Pacchionian body. 
8. Ordinary fibrous tissue from surface of mature body. 
9. Different forms of calcareous deposit. 
a. Granules with concentrically arranged tissue developing 
around them. 
d. Body of same kind, only larger and more mature. 
c. Simple, highly refractive, calcareous nodules. 
d. Am uch larger one, showing concentric markings. 
