226 Mr. R. I. Pocock on the 
is noticeable that the ligament is distinctly longer in this 
species than in the jaguar, but in the examples examined 
there is no trace of the oval sesamoid bone on the ligament 
depicted by Blainville. 
In an adult tiger (fig. 1, B) the suspensorium broadly 
resembles that of the leopard, except that the broad upper 
cartilaginous portion of the styloid bar is only about half 
the length of the slender ossified portion and the latter has 
a cartilaginous epiphysis at its lower extremity. From this a 
long ligament, without oval ossification, passes to the summit 
of the ceratohyal. Except for the absence of the ossicles on 
the ligament and its longer styloid, this suspensorium 
tolerably closely resembles that of the same species figured 
by Blainville. 
In the hyoid of a young lion (fig. 1, A) I find a long 
partly cartilaginous styloid, with a distinct cartilaginous 
epiphysis at its lower end, and long ligament passing to the 
ceratohyal, and furnished near its upper end close to the tip 
of the styloid with an oval cartilage. 
Finally, in a young ounce (F uncia) the suspensorium is 
composed of a long, tapering, cartilaginous, styloid process, 
a comparatively short ligament, and the ceratohyal. The 
structure of the hyoid in this species has not been previously 
described (fig. 1, C). 
Comparison between the hyoids of an adult leopard 
(F. pardus), tiger (F. tigris), and cheetah (A. jubatus) 
suggests that the cartilaginous tympanohyal and the ossified 
stylohyal in the last are represented by the partly carti- 
laginous and partly ossified proximal end of the suspensorium 
in the other two; and since the ceratohyal is the distal end 
of the suspensorium in the three forms, it seems obvious that 
the epihyal of the cheetah is the part that is missing in the 
tiger and leopard, its place being taken by the elastic 
ligament. 
But in the case of the jaguar (/. onca) this is not so clear. 
In the adult of this species, according to Blainville, the upper 
end of the suspensorium consists of two mutually jointed 
bones, the proximal of which is long and slender. In the 
young animal a year old (fig. 2, EZ) the upper bone is repre- 
sented by a cartilage correspondingly long, and forms a 
definite joint with the cartilaginous upper epiphysis of the 
partially ossified lower element, and is at the same time more 
sharply separated from the lower bony element than is the 
proximal cartilage of the suspensorium, the tympanohyal 
cartilage, from the bony stylohyoid element in the cheetah, 
