a monstrous Lamb, 141 
teeth : from the shape and size of these bones, added to their 
situation and the want of enamel, I take them to be portions 
of the ossicula auditus, run together, and united into masses. 
See Fig. 3. The internal surface of the cranium, is neatly 
lined with the dura mater : it is deficient in all the processes 
which divide the different portions of the brain. The anterior 
limits of this cavity terminate at the hinder part of the sulci ; 
where the middle lobes cerebri ought to be lodged. The in- 
ternal carotid arteries, and the pituitary gland, are missing. 
The two vertebral arteries enter the skull as usual, and form the 
basilary artery; which soon divides itself again, for the supply 
of the pia mater and brain of this monster. The pia mater 
envelopes the brain, as is usual, and is unconnected with the dura 
mater ; these membranes being each of them smooth, loose, 
and natural. I was surprised to find the whole cerebrum, 
and all its nerves, deficient : the cerebellum disposed quite 
orderly, and the following pairs of nerves nearly in their na- 
tural situations. First, a large pair, at the anterior inferior part, 
which is analogous to the crura cerebri : these seem to stand 
in the place of the sixth pair, only that their whole substance 
terminates in the upper cervical ganglion of the intercostal 
chain of nerves. Secondly, a large double pair, analogous to 
the seventh, coming out at the tuberculum annulare, and pe- 
netrating the meatus auditorius internus : the portio dura of this 
double pair appears on the side of the neck, after its exit from 
the cranium ; the portio mollis remains in the labyrinth of the 
organ of hearing. From the sides of the medulla oblongata, 
immediately at its origin, a number of separate fibrils come out; 
which are joined into one common chord, becoming the par 
vagum, and being finally dispersed in the ordinary manner. The 
