434 .Mr. Hunter’s Obfervations on the 
the Piked Whale, the termination of the external opening, 
inftead of being lmooth and concave, is projecting, and re- 
turns back into the meatus for above an inch in length, is 
firm in texture, with thick coats, is hollow on its infide, and 
its mouth communicating with the tympanum ; one fide being 
fixed to the malleus, fimilar to the tendinous procefs which 
goes from the infide of the membrana tympani in the others. 
A little way within the membrana tympani, are placed the 
fmall bones, which are three in number, as in the quadruped. 
Malleus, Incus, and Stapes; but in the Bottle-nofe Whale there 
is a fourth, placed on the tendon of the Stapedaeus mufcle. 
Thefe bones are as it were fufpended between the bone of the 
tympanum, and that of the immediate organ. 
The malleus has two attachments, befides that with the in- 
cus ; one dole to the bone of the tympanum, which, in the 
Porpoife, is only by contact, but in others by a bony union ; 
the other attachment is formed by the tendon, above defcribed, 
being united to the inner furface of the membrana tympani. 
Its bafe articulates with the incus. 
The incus is attached by a fmall procefs to the tympanum, 
and is fufpended between the malleus and ftapes. The procefs 
by which it articulates with the ftapes is bent towards that 
bone. 
The ftapes ftands on the veftibulum, by a broad oval bafe. 
In many of this tribe, the opening from fide to fide of the 
ftapes is fo fmall as hardly to give the idea of a ftirrup. 
The mufcles which move thefe bones are two in number, 
and tolerably ftrong. One arifes from that projecting part of 
the tympanum which goes to form the Euftachian tube, and 
running backwards is inferted into a fmall depreffion on the 
anterior part of the malleus. The ufe of this mufcle leems to 
5 be 
