Structure and Oeconomy of Whales. 4.1^ 
In the Bottle- nofe, the os hyoides is compofed of thre^ 
bones, befides two whofe ends are attached to it, being placed 
above the os hyoides, making five in all. I11 the Porpoife, Piked 
Whale, &c. it is but one bone, {lightly bent, having a broad 
thin procels pafling up, which is a little forked : it has no 
attachment to the head by means of other bones, as in many 
quadrupeds. 
The thyroid cartilage in the Piked Whale is broad from fide 
to fide, but not from the upper to the lower part : it has two 
lateral precedes, which are long, and pafs down the outfide of 
the cricoid, near to its lower end, and are joined to it much as 
in the human fubjeCt. Thefe differ in fhape in different ani- 
mals of this tribe. 
The cricoid cartilage is broad and flat, making the pofterior 
and lateral part of the larynx, and is much deeper behind, and 
laterally, than before. It is extremely thick and flrong, flat- 
tened on the pofterior furface, and hollowed from the upper 
edge to the lower. It terminates by a thick edge on the pofte- 
rior part above, but irregularly at the lower edge, in the carti- 
lages of the larynx. 
The two arytenoid cartilages are extremely projecting, and 
united to each other till near their ends ; are articulated on the 
upper edge of the cricoid, but fend down a procefs, which 
pafles on the in fide of the cricoid, being attached to a bag in the 
Piked Whale, which is formed below the thyroid and before the 
cricoid cartilages ; they crofs the cavity of the larynx obliquely, 
making the paflage, at the upper part, a groove between them : 
the cavity at this place fwells out laterally, but is very narrow 
between the anterior and pofterior furfaces. The paflage above 
between the arytenoid and thyroid cartilages is wide from fide 
to fide, and is continued down on the outfide of the procefles of 
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