1. Meningitis. Inflammation of the coverings of the brain, and
2. Encephalitis (Cerebritis). Inflammation of the nervous substance. These are further subdivided into:
A. Pachymeningitis. Inflammation of the dura Mater.
B. Leptomeningitis. Inflammation of the pia Mater.
C. Purulent Meningitis.
D. Serous Meningitis.
E. Tubercular Meningitis.
F. Traumatic Meningitis, etc.
G. Cerebro-Spinal or Infective Meningitis.
H. Acute Meningitis.