THE MYOLOGY OF THE RABBIT. 439 



The glenoid cavity is elongated from before backwards. 

 The suture between the jugal and the maxillary becomes 

 obliterated, and there is no orbital process given off from 

 the zygoma. A considerable extent of the outer wall of the 

 maxilla remains incompletely ossified. The premaxilla is 

 extremely large and trifurcated. 



The ascending portion of the ramus of the mandible is 

 long, and the coronoid process well developed. The long 

 axis of the condyle is antero-posterior, and the angular 

 process has a slight inward projection. In the palate, the 

 prepalatine, or incisive, foramina are enormous ; and partly 

 in consequence of this, partly by the posterior excavation 

 of the palatal plate of the palatine, the roof of the palate is 

 reduced to little more than a transverse bar of bone. 



The scapula is long and narrow, and the backward process 

 of the acromion, to which reference has already been made, 

 gives attachment to a slip of the trapezius. A bony clavicle 

 is present, but it is incomplete at both ends. There is a 

 supra-condyloid foramen in the humerus. The radixis and 

 ulna are comj)lete, but are fixed in the attitude of pro- 

 nation. 



The femur has a small third trochanter. The tibia and 

 fibula are ankylosed. The internal cuneiform bone is 

 wanting, and the plantar siu-face of the navictdare gives off 

 a large process. The inner side of the base of the second 

 metatarsal sends a process along the inner face of the meso- 

 cuneiform to articulate with the naviculare. This may 

 represent a rudiment of the hallux with the ento-cuneif orm. 



In the myology of the Rabbit the vast size of the flexors 

 and extensors of the back has already been noted. The 

 muscles moving the fore, and especially the hind, limbs, 

 and the masseter, are not less remarkable for their dimen- 

 sions. In the fore limb, the supinator longus is absent. The 

 extensor indicis and secundiinternodii pollicis form one muscle. 

 The extensor minimi digiti goes to the foui-th and fifth digits. 

 The flexor perforans and the flexor pollicis longus xaAt& in 

 a common tendon which divides into five slips, one for each 

 digit. There are tkree lumbricales from the radial sides 



I 



