HALICORE. 



151 



10. Heart of a Dugong, sliowing the separation of the two 



ventricles at the apex by a deep cleft. The cavities 

 have been opened into and the valves exposed. 



Knox Collection, No. 116. 



11. Kidney of Dugong, not lobulated, bisected longitudinally; 



the pelvis is opened into and the apices of the pyramids 

 are exposed ; bristles have been placed in the opening 

 of the ureter. 



12. Kidney of Dugong, not lobulated, bisected ; the relation of 



the calyces to the mammillary apices of the pyramids 

 is shown. Knox Collection, No. 121. 



[The drawings Nos. 13 to 18 are described and repro- 



