112 Mr. Gulliver's Observations on the Blood Corpuscles 



commonly presented the following diameters, l-4365th and 

 l-4<752nd of an inch ; and there were several l-4000th, the 

 thickness of the edges of the disks being l-lGjOOOth. 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 K.ax\gSiroo, {Macropus Eugeniil) a female, l-3554th, 

 ]-34?32nd,and 1-S200th, a common diameter of the disks, and 

 1 -4000th and 1 -3000th rather frequent sizes. The edges of 

 the corpuscles generally from l-12,000th to l-10,000th of an 

 inch thick. Blood from a prick of the tail. 



100. The Coypu, {Muopotamus 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 

 1 -9600th. In the serum, the corpuscles were more variable 

 in size, l-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-3840th, 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 1 -4000th, 1 -3790th, and 1 -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 niger,) an adult. All the 

 following sizes frequent, 1 -3600th, 1 -3692nd, l-3790th, and 

 l-3840th. Extreme diameters l-5333rd and l-3000th. A 

 kvf 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 I think they 

 appeared in the blood of the female Sloth Bear. In the Palm 

 Squirrel (72.) there were several about l-7000th of an inch. 



104. Wild Boar, {Sits Scrofa,) from Asia, male, nearly 

 full-grown. l-4266th, l-4365th, and l-4000th, most frequent 



