THE VASCULAK LAMINAE. 45 



nothing after the death of the animal, and in a dried 

 specimen there is only a space to show where the 

 coronary ring has been. 



At m is shown the soft frog, which is guarded by 

 the hard or exterior frog, which is seen at N. This, 

 however, is not quite large enough. The draughts- 

 man, who, I regret to say, died almost suddenly before 

 the series of drawings was completed, could not obtain 

 access to a specimen which had not been mutilated by 

 man, and therefore had to draw the frog as he saw it. 



p shows the internal or sensitive sole, and o the 

 hard or .external sole, which 

 has already been mentioned. E 

 shows the wall or crust, and U is 



tire skin, horny laminae. 



Now we will see how the 

 sensitive structures are connected with the external 

 hoof, which, it must be remembered, is the analogue 

 of the human nail. 



The reader will remember that on page 29 the six 

 hundred lamina? of which the wall is composed were 

 compared to knife-blades, the edges being inwards. 

 Upon the coffin bone are set edgewise a corresponding 

 number of vascular, or sensitive lamina?, shaped very 

 much like the horny lamina?, and inserted between 

 them like partially interlaced fingers. They hold 

 the hoof so tightly that to pull it off, even when the 



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