EXPLANATION OF THE PLATES. 



PLATE III. 



For the blood from which the figures contained in this 

 plate were made, as well as some of those of the following 

 plate, I am indebted to the kindness of Mr. Ogilby, the 

 Secretary of the Zoological Society, who, on my application 

 to him, promptly and courteously forwarded to me the per- 

 mission requisite to enable me to obtain it. 



Fig. 1. The red and white blood corpuscles of the drome- 

 dary ; in water the former became perfectly sphe- 

 rical. 



2. The same, of the SIREN. 



3. The same, of the Alpaco. 



