MONOTKF.MATA. 
23 
this structure of sternum aud shoulder, wo perceive an ap¬ 
proach to the Birds; and there is a still greater resemblance in 
these parts to the Lizards and Ichthyosauri, as is pointed 
out by Prof. Owen. The sternum and shoulder bones are 
essentially upon the same model in the Echidna 1 . 
Sternum of the Echidna. 
a. a . The two lateral processes of the epistemum, along the upper 
surface of which are attached the claricles. 
b. The scapula, or blade-bone. 
c. c. The coracoids. 
d. d. The cpicoracoids. 
1 For a detailed account of the anatomy of the Monotremata, we must refer 
our readers to the able article under that head, by Prof. Owen, in Todd’s 
Cyclopedia of Anatomy and Physiology. 
_. 
