BOOK III. 



45 



A. C. — The mountain. B—Vena profunda. 



Another kind, unlike the venae profundae, neither ascend to the surface 

 of the earth nor descend, but lying under the ground, expand over a large 

 area ; and on that account I call them " venae dilatatae." 



A. D. — The mountain. B. C — Vena iilatata. 



