C 7*5 ) 
Auditory Nerve from a little Protuberance which (eems 
to be made for therfi : One of theni goes over the Op- 
tick Nerve in the Orbit of the Eye, the other two go 
under the Eye. Two are diftributed nigh the end of the 
upper Bill, and are there very much expanded, paffing 
through the Bone into the Membrane, lineing the Roof 
of the Mouth. The third Pair is diftributed near the end 
of the lower Bill, and fubdivided like the former. Note, 
that Birds that pick their Food where they can fee it have 
not thefe Nerves, and that the Pair of Nerves belonging 
to the upper Bill is confiderably (mailer in proportion to 
the Fowls than thofe obferv'd above ; whence it is pro- 
bable that thefe Nerves weredefigned for fbme great u(e f 
both on the account of their number and their large- 
nefs ,• and that the ufe to be affign'd to them muft be to 
enable them todiftinguilh (whether by tailing or feeling 
I will not now diftinguifti) their Food, there being a 
neceffity of a more exquifite Senfe in thefe Fowl, than 
in any other. Fig. 1 5. reprefents thefe in a Ducks Head, 
where a a express the Edge of the Cranium, which 
was in part remov'd for the more clear view of thefe 
Nerves, h b are the Cells about the Ear between the two 
Tables above defcribed, c c the Brain laid bare with 
its Blood- Veflels, d dd the three Nerves on one fide, 
e the Optick Nerve, /// the Skin and part of the Bone 
remov'd to bring the Nerve in view,g g the two Nerves 
expanded near the end of the upper Bill, b b that in the 
lower. 
9. All the Eyes of Fowl and of Fijh that I have ex- 
amined were more or lefs cartilaginous ; for the Sclerotis 
is n Cartilago fui generis, efpecially near the Cornea in 
all thefe Animals. And in the larger forts of both I re- 
membred to have found the whole Sclerotis fuch a kind 
of a Cartilage, 
Y z 10. To 
