850 MR. ST. GEORGE MIVART ON THE [ Dec. 6, 
final destiny might afford important information for helminthology ; 
and the investigation would be easy now we have learned this station 
and phase of the worm. Hence | have given the sketch (fig. 9, 
p. 848), and hope soon to examine more fully the anatomy of this 
entozoon in fresh specimens. 
The average length of each worm was 7; of an inch; its shape 
oval with two projecting papille ; the integument distinct and com- 
posed of two coats, the body filled with pale round corpuscles and 
many oval ones. There seemed to be a mouth with a feeble current 
setting into it; but neither hooklets, spines, nor vibratile cilia were 
visible. The motions by contraction and expansion of the worm were 
very remarkable; and this evidence of its vitality continued two or 
three days after the death and putrefaction of its host. 
11. On the Myology of Chameleon parsonii. 
By Sr. Grorce Mivart, F.R.S. 
The singular modifications of the appendicular skeleton of the 
Chameleon, and the remarkable resemblances which exist between 
its pectoral and pelvic portions, naturally suggest that its myology 
cannot be other than interesting. 
An unusually good opportunity of investigating that myology 
having, through the kindness of my friend Professor Flower, pre- 
sented itself, I beg to bring before the Society the results of the 
dissection of a magnificent specimen of the above-named large 
Chameleon of Madagascar, 
AXIAL MUSCLES. 
I. Musctes or THE HEAp. 
Mylo-hyoideus anterior (figs. 1 and 3, M’). This muscle forms, 
as usual, a delicate layer which arises inside the ramus of the 
mandible, meeting and joining its fellow of the opposite side beneath 
the throat. Its fibres pass downward and backward; and its 
posterior portion overlaps and is superficial to the antero-inferior 
part of the posterior mylo-hyoid. 
Mylo-hyoideus posterior (figs. 1 and 3, M*). A considerable 
but delicate muscular lamella arises from the inner side of the 
suspensorium of the mandible, and, passing downwards beneath the 
throat, meets its fellow of the opposite side. It is immediately 
superficial to the genio-hyoid, but anteriorly it passes above the 
anterior mylo-hyoid, so that the fibres of the latter are superficial to 
it. Posteriorly this muscle gradually loses itself in the delicate fascia 
investing the muscles of the chest. 
Above, this muscle is closely connected with a thin muscular 
layer which springs from the dense fascia binding down the muscles 
of the occipital crest, and which ends in the fascia which encloses the 
levator clavicule. 
