EXPLANATION OF THE PLATES. 



PLATE IV. 



Fig. 1. Represents the blood corpuscles of the elephant, red 

 and white, which are the largest hitherto discovered 

 amongst the mammalia. 



2. Exhibits the blood corpuscles of the goat, both red 



and white, which are amongst the smallest as yet 

 made known in the class to which they belong. 



3. Peculiar concentric corpuscles, taken twenty-four 



hours after death from a polypus contained in the 

 heart of an old man. 



4. A portion of fibrin, removed from a small cavity 



situated beneath the buffy coating formed on some 

 blood which had been abstracted from a woman the 

 subject of epileptic fits, and for which she was bled; 

 it exhibits the granular and fibrous structure, which 

 the spontaneously coagulable element of the blood 

 invariably assumes in solidifying 



5. A portion of fibrin, constituting the buify coat, and 



which formed a thick membrane on the surface of 

 the blood abstracted from the woman already alluded 

 to; it exhibits more clearly the fibrous construction 

 of the fibrin, the fibres being rendered more appa- 

 rent by. the action of corrosive sublimate, and also 

 some of the white corpuscles which are found 

 usually in such abundance in the so called inflamma- 

 tory crust. All false membranes have a constitution 

 precisely similar. 



6. Blood corpuscles of the earth worm in various states; 



those contained in the lower half of the circle repre- 

 present them as they appear in the liquor sanguinis, 

 or plasma, in which most of the corpuscles speedily 

 assume a stellate form, as do those of most of the 

 invertebrate animals, and in which state they bear 

 a close resemblance to the hispid pollen granules of 



