Blood Corpuscles qftJie Mammlferous Animals. 329 



of vision, and that the lanceolate particles often so revolve. 

 Besides, their length much exceeds the diameter of the cir- 

 cular discs ; the extremities of the oblong corpuscles are 

 acutely pointed, and their form and appearance is altogether 

 remarkably distinct and peculiar. Finally, I have preserved 

 dried specimens, which I shall be happy to show to any gen- 

 tleman who may feel an interest in the subject; and as the 

 animals are alive in the collection of the Zoological Society, 

 no difficulty is likely to remain in the way of inquiry into the 

 facts recorded in this paper. 



For the accompanying drawing (see wood-cut) I am in- 

 debted to my friend Mr. John Dalrymple, who executed it 

 from two portions of blood which I sent to him for the pur- 

 pose ; one being dried on glass, and the other preserved in a 

 weak solution of common salt. The larger group represents 

 the corpuscles as he saw them with a deep achromatic object- 

 glass adapted to a compound microscope. The smaller group 

 exhibits the most remarkable forms of the corpuscles selected 

 and compared together. 



The following observations were made at the time the 

 blood was examined. 



1. Reeves's Muntjac Deer (Cervus Reevesti). The circular 

 discs l-7200th to l-6000th of an inch in diameter ; the ob- 

 long particles from 1 -4000th to l-2666th of an inch in length, 

 and 1-12, 000th to l-8000th in breadth, at the gibbous part. 

 Examined in the recent state, also in urine, in a weak solution 

 of muriate of soda, and dried on glass. In the fresh speci- 

 mens, the spear-shaped, lunated, and common circular cor- 

 puscles often seen turning over in the field of vision. There 

 appeared to be a very great variety in the form of the cor- 

 puscles ; for besides those already described, there were many 

 oval and egg-shaped, and even triangular or square particles, 

 the two latter indeed not so accurately defined as the former. 

 All these figures may be seen in the corpuscles of the Mexi- 



