ENDOSKELETON. ANIMALS. 35 



has been removed from the cavity in which it was imbedded. 

 0. C. 132 n. Mus. Heaviside, No. 90. 



A. 140. The sternum and sternal ribs of a Human Foetus of the 

 sixth month, injected, dried, and preserved in oil of tur- 

 pentine. Four centres of ossification are established in the 

 sternum, representing the ventral spines of the first four 

 thoracic segments of the skeleton. 0. 0. 132 C. 



Mus. Sir Astley Cooper, Bart. 



A. 141. The sternum and sternal extremities of the true ribs of a 

 mature Human Foetus. Four separate points of ossification 

 may be observed in the sternum. 0. C. 133. Hunterian. 



A. 142. The sternum of a Child at an early period of life, showing 

 vessels from the internal mammary arteries, ramifying on 

 the several separate ossifications. 0. C. 134. Hunterian. 



A. 143. The left humerus of a new-born Leopard (Felis 

 pardus), showing the cartilaginous epiphyses : the lower 

 one is extended over the division of the inner condyle, and 

 closes there the fissure through which the brachial artery 

 and median nerve pass ; which fissure, by subsequent 

 ossification and confluence of the distal epiphyses, is con. 

 verted into a foramen. 0. C. 133 F. 



A. 144. A section of the proximal extremity of the humerus of a 

 young person, showing the reticular cancellous structure of 

 the epiphysis, and of the extremity of the diaphysis of the 

 bone. O.C. 204. Hunterian. 



A. 145. The counterpart of the preceding preparation. 0. C, 

 205. Hunterian. 



A. 146. Longitudinal sections of the extremities of a Human 

 humerus, radius, and ulna, from a subject aged 15 years. 

 0. C. 205 A. Presented by A. H. Tubby, Esq. 



A. 147. A. section of the epiphysis of a metacarpal bone of a ( Jalf, 

 showing ossification beginning in several parts of the 

 cartilage. 0. C. 139. Hunterian. 



D2 



