BOOK III. 



45 



A. C— The movntain. 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 dilatata. 



