VOL. XXI.] PHILOSOPHICAL TRANSACTIONS. 425 



large vein of the dura mater entered the longitudinal sinus, directly forwards 

 towards the crista galli, contrary to the course of the blood. 



The pia mater was very much distended, and seemed to be stretched as much 

 as it could bear. It lay smooth and equal on the surface of the brain, there 

 being neither any circumvolutions in the brain for it to go between, nor any 

 partition to the corpus callosum, though there was a large falx in the dura mater. 

 The lateral ventricles were very thin ; towards the cerebellum their upper part 

 was quite wasted, so that nothing was left to cover the cavity in that place, but 

 the pia mater. This was so thin, that in bending down the head to empty the 

 water, it broke, and hindered us from knowing exactly how much water the 

 lateral ventricles contained ; but by their cavity, which was very large, one 

 might guess they held at least a pint each: the 3d and 4th ventricles had some 

 little water in them, but were scarcely larger than usual, as Steno has observed 

 in his hydrocephalous calf. 



The brain had all its parts plain and entire, though its substance in most 

 places was but very thin and loose : about the corpora striata et thalami nervo- 

 rum opticorum it was tolerably thick and firm enough, though nothing to what 

 it is in a natural state. The cerebrum et cerebellum, when laid out in their 

 proper position, were 1 1 inches long ; the cerebrum across the lateral ventricles 

 9 broad. After all the water was taken out, both of them weighed 1-i-lb. The 

 corpora striata et thalami nervorum opticorum were very small in all their di- 

 mensions ; withinside toward the ventricles they were wrinkled, and lay in folds, 

 like those in the inner coat of the stomach. In the corpora striata there were 

 no striae discernible. 



The plexus choroides was very small : the glandula pinealis was somewhat 

 larger, but less compact than ordinary. The nates were very red and large ; 

 2 inches long, 1 broad, and 1 thick : the testes were not distinguished from 

 them by any protuberance: they seemed rather to be a production into which 

 the nates lessened by degrees, like a sugar-loaf. 



The cerebellum was very firm every where, and did not much exceed its 

 natural bulk. The medullary trunk, which sends out those little branches like 

 trees, was thicker and harder than usual ; the branches were not so much dis- 

 posed like those of a tree, but went rather in single oblique lines, like so many 

 rays drawn from a point. The nerves were all regular and plain, only the 

 olfactory were very small ; the optic did not join before they entered the orbits. 

 The rete mirabile was very large ; and so was Dr. Ridley's circular sinus. 



On the right side were two carotid arteries, the intercostal nerve lying be- 

 tween them, and they entered the skull at the same hole. The trunk of the 

 vertebral, where those arteries unite, was extremely large and full of blood. 



VOL. IV. 3 I 



