112 Mr. Gulliver’s Obsermtions on the Blood Corpuscles 
commonly presented the following diameters, l-4?365th and 
l-4752nd of an inch; and there w^ere several l-4000th, the 
thickness of the edges of the disks being 1-16, 000th. The 
blood was examined quickly after it was obtained, and no 
appreciable difference was seen between the arterial and ve- 
nous corpuscles. They are certainly but very slightly smaller 
than in| the tiger. 
99. K }L^ugSLXOo, {Macropus Eiige7iiil) a female, 1-3554-th, 
]-3432nd,and l-3200th, a common diameter of the disks, and 
1 -4000th and l-3000th rather frequent sizes. The edges of 
the corpuscles generally from 1-1 2,000th to 1-1 0,000th of an 
inch thick. Blood from a prick of the tail. 
100. The Coypu, {Myopotamus Coypus^) an adult. Most 
common diameters of corpuscles l-3500th and l-3200th of 
an inch. Small disks, 1 -4000th ; large, l-2666th, in the dry 
state. Thickness of the edges of the corpuscles 1-1 2000th to 
l-9600th. In the serum, the corpuscles were more variable 
in size, 1 -4572nd and l-3000th of an inch being very fre- 
quent. Blood from a prick near the buttocks. 
101. Gray Squirrel, {Sciurus cinereus,) adult male. Com- 
mon diameters l-4266th, l-4000th, l-3S40th, and l-3600th. 
Extreme sizes l-6000th and 1 -3000th. Magnitude of cor- 
puscles very irregular; a few not more than l-6400th. 
Blood from a prick of the nose for the first examination, and 
from the ear a few days subsequently for another trial. 
102. Capistrated Squirrel, [Sciurus capistratus^) adult male. 
Common diameters l-4000th, l-3790th, and l-3693rd. 
Extreme sizes l-5333rd and l-3000th. A few of the very 
small corpuscles less than l-6400th of an inch in diameter. 
Blood from a prick of the upper lip. 
103. Black Squirrel, [Sciurus 7iiger,) an adult. All the 
following sizes frequent, 1 -3600th, 1 -3692nd, l-3790th, and 
l-3840th. Extreme diameters l-5333rd and l-3000th. A 
few of the very small corpuscles were seen. 
The size of the corpuscles, as far as I have observed, is 
very irregular in the genus Sciurus. There are circular 
particles, though not in large numbers, yet very remarkable 
for their regularity and diminutive size in regard to the com- 
mon blood disks. For this reason the very small corpuscles 
should be further examined. I have certainly seldom seen 
them so remarkably in any other genus, though 1 think they 
appeared in the blood of the female Sloth Bear. In the Palm 
Squirrel (72.) there were several about 1 -7000th of an inch. 
104. Wild Boar, [Sus Scrofa,) from Asia, male, nearly 
full-grown. l-4266th, l-4365th, and l-4000th, most frequent 
