ADVENTITIOUS PRODUCTS IN THE CRANIAL CAVITY. 5 3:] 



paralysis, amaurosis, and paralysis of the muscles of mastication, 

 for a considerable period before its death. The post mortem ex- 

 amination revealed that the bones above mentioned had been 

 absorbed, the frontal sinuses filled with a white mass resembling 

 brain, but which proved to be thickening of the dura mater ; the 

 brain compressed, very solid in consistence ; the lateral ventricles 

 almost obliterated by approximation of their sides and roof, and 

 the brain generally anemic. There was no previous history to 

 this case. It is very probable, however, that this condition was 

 a result of an injury, such as a blow upon the head, causing 

 perhaps partial detachment of the dura mater without fracture 

 of the bones, and consequent chronic inflammation. 



In another case there was enlargement of the lachrymal gland 

 causing absorption of the bones of the orbit, and death by 

 pressure on the brain. The cranial bones as well as the brain 

 are now in my possession, and were obtained from an old 

 horse, which had presented no signs of disease, except a slight 

 difficulty in masticating its food for a few days prior to death, 

 and at first was supposed to be another specimen of induration 

 of the dura mater : but further examination proved it to be due 

 to enlargement of the lachrymal gland. In addition to pene- 

 trating the cranium, the tumour partly fiUed the frontal sinus on 

 the same side, causing partial absorption of the orbital process of 

 the frontal bone ; but the most remarkable circumstance in con- 

 nection with the progress of the case was the fact that at no time 

 was there any bulging or undue prominence of the eye ; a condi- 

 tion that one would have supposed would have been a more likely 

 one to occur than absorption of tlie osseous walls of the orbit. 



The tumour measured several inches, was lobulated in char- 

 acter, and microscopically was found to consist of numerous cells 

 imbedded in a few very delicate fibres. The tumour presented 

 no signs of retrograde change, and partook of the character of 

 lymphadenoma in many particulars. 



TUBERCULAR DEPOSITS IN THE MENINGES OF THE BRAIN. 



Tubercular meningitis — a disease not rarely met with in the 

 human being, more especially in the young — is a very rare affec- 

 tion in the lov.'er animals. I have seen it in calves about 

 three months. 



