106 
animals, from the first pair of ribs and their cartilages ; the latter 
muscles are but narrow. There is no separate stylohyoideus, the 
digastricus giving some fibres to the os hyoides. The Tapir also pos¬ 
sesses the muscle whose fibres (to use the words of Cuvier) fill a por¬ 
tion of the interval of the two cornua of the same side. There is a 
double pair of thyro-arytenoid muscles, the upper being partly con¬ 
tinuous with the transverse arytenoid muscle, and forming a powerful 
constrictor of the glottis. 
The muscles of the limbs formed also a portion of my investiga¬ 
tions ; but to pmnt out all their peculiarities would involve the repe¬ 
tition of many that are known to be common to the Ungulata. A 
peculiar muscle arises near the top of the scapula, and covering the 
supraspinatus, joins the complex muscle formed by the union of the 
cleidomastoideus with portions of the trapezius and deltoid, called by 
the French anatomists “muscle commun de la tete, de l’encolure, et 
du bras.” The levator scapulae and pectoralis minor are wanting, as 
in the Horse. The coracobrachialis is a long slender muscle, reaching 
nearly to the inner condyle of the humerus. The brachialis anticus 
arises from the whole of the rounded posterior side of the humerus, 
immediately below its head; it consequently embraces and twists 
round this bone, to proceed to its usual insertion. The anconeus 
seems to be wanting, or confounded with the triceps. In the fore¬ 
arm, we find the pronator teres represented by a small bundle of fibres 
closely adherent to a tendinous ligament, which extends from the 
inner condyle of the humerus all down the sharp edge of the radius. 
In the hand, the special muscles of the outer toe are all well-deve¬ 
loped. In the posterior extremity, the soleus is wanting, and the 
tibialis posticus is wanting also. The flexor longus pollicis is here, 
as in all the lower animals, the principal flexor of the toes, arising 
principally from the fibula, which is here well-developed, and receiving 
the small tendon of the flexor longus digitorum, after both have passed 
the ankle in their usual places. 
All the organs were perfectly healthy, but the large veins were full 
of very dark blood, and considerable clots of fibrine were found, not 
only in the veins and heart, but even in the aorta. Numerous bruises, 
received in its journey from Liverpool, disfigured the exterior of the 
animal, and probably assisted, with the unusual coldness of the 
weather, in causing its premature demise. 
4. On the Iguana of S ta Lucia, Metopoceros cornutus 
of Wagler. By Lieut. Tyler, R.E. 
(Reptilia, PI. III.) 
This species attains a length of five, and sometimes even of six feet, 
the tail being about twice and three-quarters the length of the bodv. 
When first hatched it measures four inches. The tail is thick at its 
commencement, and is so connected with the body that it becomes 
difficult to define precisely their respective limits. The fore and 
hind legs are thick and muscular, with five toes on each, armed with 
strong hooked talons, by any one of which the animal can support 
