1870.] MYOLOGY OF CHAMELEON PARSONII. 859 
Not that it could be expected, @ priori, that serial muscular homo- 
logies would in it be reduced by any means to their simplest ex- 
pression ; for not only is the pronation of the forearm and manus 
extreme, but the pes is also twisted in a most exceptional manner, 
so that the tibialis anticus is in part on the back of the leg, and so 
that, when the elbow and knee are placed outward in their primi- 
tive embryonic condition, the palmar surface looks mainly outward 
with the pollex posterior, while the plantar surface looks mainly 
inwards with the hallux anterior. Nevertheless the correspondence 
between many of the muscles is striking; and I have endeavoured 
to express below the various serial relationships as they have 
struck me—some being of course very doubtful, but others tolerably 
certain. 
The muscles outside the scapula seem to me to answer to those 
outside the scapula of Man, and the subscapularis of the Chameleon 
to his subscapularis. If this is so, the muscles arising outside the 
ilium I have named glutei; but Professor Rolleston* will possibly 
object to this. If they are the glutei, then the “ideal vertebral 
surface’? + must be conceived to be suppressed in the Chameleon’s 
ilium, and its external surface must correspond to the inner surface 
of its scapula. If they are not glutei, but serial homologues of 
suprascapular muscles, then the ideal preaxial surface must be 
deemed to have increased to the annihilation of the ideal postaxial 
one. On the latter hypotheses, the outside of the ilium will answer 
to the outside of the scapula, and there will be no glutei but the 
gluteus maximus—the subscapulares being thus without a homotype 
in the pelvic limb. 
The following list, as suggested by the Chameleon’s muscles, is 
offered for inquiry :— 
Gluteus maximus -+ biceps. 
Gluteus medius and minimus. 
Iliacus. 
Obturator externus + adductor. 
Obturator internus. 
Extensores femoris. 
Semitendinosus + semimembra- 
nosus + sartorius. 
Tlio-peroneal. 
Gastrocnemius internus. 
Gastrocnemius externus. 
Tibialis anticus. 
Extensor longus digitorum. 
Peroneus. 
Flexor longus digitorum + flexor 
longus hallucis. 
Flexor tertius digitorum. 
* L.c. p. 629 
Latissimus dorsi+ flexor ulnaris. 
Subscapularis. 
Supra + infraspinatus + deltoid. 
Coraco-brachialis. 
Deepest part of coraco-brachialis. 
Triceps. 
Biceps + brachialis anticus (?). 
Scapular head of triceps. 
Supinator longus. 
Pronator teres (?). 
Extensor carpi radialis longior. 
Extensor carpi radialis brevior. 
Extensor ulnaris. 
Flexor longus pollicis. 
Flexor longus digitorum. 
+ Prof, Flower’s ‘ Osteology,’ p. 335. 
