EXPLANATION OF THE PLATES. 



PLATE LIX. 



Fig. 1. Longitudinal section of kidney, showing the corpora 

 Malpighiana. 



Fig. 2. Uriniferous tubes of a bird ( Gallus indicus), showing 

 their pinnatifid arrangement. Drawing made from 

 a preparation of Professor Hyrtl, in the possession 

 of the Microscopical Society of London. 



Fig. 3. Corpora Malpighiana of the horse. Drawing made 

 from an injected preparation by Professor Hyrtl. 



Fig. 4. Vessels of the surface of the kidney. The capil- 

 laries are situated in the interstices between the 

 tubes. 



Fig. 5. A transverse section of the kidney more highly mag- 

 nified, showing the convoluted vessels of the cor- 

 pora Malpighiana, as well as the capillaries which 

 encircle the uriniferous tubes. 



