C 7*0 
io. In the Eyes of Fifh I obferv'd that the Procerus 
Ciliaris is not faftned to the joining of the Cornea 
Sclerotis, as in all other Animals that I difle&ed, io 
as to hinder the watery Humour to go any further 
backward. For I conftantly ohferv'd that the Humor 
Aqueus may move a good way backward in fome, and 
in others almoft as far as the Optkk Nerve. I fhall at 
another time make fome Remarks on this. 
ill I have in as many Fifh as I could conveniently 
examine carefully, found a Membrane which cover'd 
the Tunica Cornea^ fo as not to let any Water come to 
it. Thisanfwers the Memlrana Nittitans in Fowl, and 
reaches on all fides to the Cutis of the Fifh to which it 
is faftned ; this is tranfparent, and pretty thin , and fo 
is alfo the Cornea, if compar'd to that of the Quadru- 
peds. 
ix. I have frequently obferv'd in (mailer Fowl, that 
the Membrane of the Drum was double ; for I have by 
gently pulling away the Membrane lining the Tube of 
the Ear, I obierv'd at the bottom of it a tranfparent 
Membrane, which at firft I took to be the Membrane of 
the Drum, but upon Examination I found that the Mem- 
brane of the Drum was ftili entire and in its proper place. 
1 have fbmetimes obferved this in larger Fotcl, in a Seal, 
and in fome other Animals, and am apt to think from 
a cafe mentioned in Du Verneyes Book of the Ear, that 
it is fb in Men ; and if fb, it is likely it may be Co in 
moft, if not in all Animals. The Obfervation was as 
fol lower h ; A Perfon that was deaf for fome time died, 
vvhofe Ears Mr. Du Ferneye examin'd, in order to find 
out the cau(e of his Deafriefs, which he found to be a 
thick Membrane growing in the Ear before the Drum> 
which hindred the Impulles in the Air to be communica- 
ted to it. Now I take it to be -more likely that the 
Membrane fhould be double, and that the outward was 
preternaturally incraflated, then that a Membrane fliould 
grow in a place where the fides do not touch. 
VII. An 
