172 OSSEOUS, MUSCULAR, AND NERVOUS SYSTEMS 
thing struck me more forcibly than this strict accordance 
of the nervous system with that of the Mammalia in gene- 
ral : the same observation is applicable to the bones and mus- 
cles, so that the analogy supposed to exist between the Or- 
nithorynchus and Birds is reduced to the resemblance of the 
ossicula of the ear, and to the female organs of generation, 
which I have not as yet had an opportunity of examining. 
I could easily have swelled out these memoirs to a much 
greater length, by entering into the minute anatomical 
details, which were carefully taken down during the dis- 
section ; but I cannot think that these would in the least 
interest the Society, since they do not lead to any general 
physiological results. 
Eocplanation of Plate V. 
Fig. 1, Gives a front view, from nature, of the complex cla- 
vicle and scapulae of the Ornithorynchus. The 
bones are represented of their natural size. 
a, Marks the upper or anterior bones of the ster- 
num, the Entosternal of Mons. Geoffeoy St 
HiLAiRE. To these bones the anterior pair of 
ribs are attached at a. 
b, The clavicle, {FurcuMre of M. Geoffroy.) 
c, The process of the scapula joining the clavicle, 
and which I consider, with M. Geoffroy, as 
analogous to the coracoid process in Man, and 
the true clavicles in Birds. 
d, The glenoid cavity of the shoulder-joint. 
e, The peculiar, flat, and highly moveable bone, 
articulated by a moveable joint, with the coracoid 
process of the scapula ; it passes up behind the 
clavicle, and its upper or anterior edge may be 
seen at £?, c. It is this bone which performs an ex^ 
