( i^S^ ) 
tJiimng tHc difFerence between the two ScaU: He remarks- 
that Modern Anatomifts do err in the pofitioa of thefe 
Scal£ or turnings 5 forwhat they call the fuperior he rights 
ly names the inferior, e contra. Its Septum is made up 
of two fubftances, one hard but very friable, caird Lumwn 
Spiralis^ the other foft, thin and pellucid, which he calls 
by a new name Zofta €ocBle£. 
The Canal, by which the Auditory Nerves enter, he 
divides into the common, which admi'S both the foft and 
hard pair together, and the particular, which- contains 
only the Forth Dura : He obferves that it's this particular 
Canal in which the hard portion lyes, ihit FoUopius firft 
difcover'd and nam'd it, oh jimilitudlmm^ AqusduSus : The 
Tuba 'Euftdchii is very falOy, tho' now commonly fo call'd* 
He obferves, that as the Portia dura turns afide from the 
common Channel into its own, it detaches one Branch, 
which going out,at a hole in the inWe of the Oi Petrof^^^, 
fpreads itfelf upon the D/^m Me^^r and Trunk. of the jih 
pair of Nerves in (everal fmall Twigs. 
In the bottom of the common Canal, he takes notice 
of three fmall Sinuofities or Cavities , one defcends 
towards the Centre of the Cochlea , in which are 
feveral holes for the entry of part of the Forth 
tnollk^ where it is dilated into a. very fine Membrane 
which makes the Zona, Cochle£^^ the fecond goes to- 
wards ihQ Vejitbuhm^ through which the Forth mollis Qn* 
ters by five holes, where its twigs or branchings are pre*^ 
fently expanded into a very fine Membrane^ which lines all 
its furf^ce^ being further continued thro' all the Semicircu- 
lar duds : This Nervous expanfion, from it refemblance to 
a very thin and narrow Ribbond or Fillet, he calls Zona^ 
and from its ufe. Sonars^ of which he reckons three, accord- 
ing to the number of Canals: He fays, thefe Zon^ Sonor^^. 
are very confpicuous in feveral Quadrpudes, and in Volatils 
efpecially* 
The. 
