The Red Globules: Erythrocytes. 511 



■more definite change, the cell may be pear-shaped, tvith one or 

 more rounded projections at the poles. These projections may 

 break loose, forming very small independent cells. Exceptionally, 

 amoeboid movement has been claimed in these projections or in 

 the entire cell. Such degenerations and changes have been 

 noted in anaemia, and in protozoan invasion of the blood (Texas 

 fever, surra, nagana, dourine, mal de Caderas, malaria) , and, 

 taken along with other symptoms, they may furnish a valuable 

 ■corroborative means of diagnosis. Examination should be made 

 with freshly drawn blood — that which has stood twelve hours in 

 a vessel usually shows poikilocytosis. 



Number of Red Globules. Counting of the red globules is often 

 ■of material advantage, although it requires elaborate apparatus, 

 skill, accuracy, and time, which few veterinarians can command. 

 The number of red globules per cubic millimetre of blood, in the 

 -different domestic animals, in normal condition, has been set 

 -down as follows : 



Horse. 



Maximum 9.934.000 (Burnett, Moore, Haring, Cady), 8.000.- 

 -000 (Sussdorf). 

 Minimum 7.148.000 (Burnett, Moore, Haring, Cady), 6.500.- 



000 (Sussdorf). 

 Average 7.944.714 (Burnett, Moore, Haring, Cady), 7.212.- 



500 (Sussdorf). 



Cow. 



7.000.000 in winter and 

 5.000.000 in late autumn 

 (Burnett). 



Maximum 8.712.500 (Hayem). 

 Minimum 4.200.000 (Malassez). 

 Average 6.000.000 (Smith and Kil- 



bourne). 



Sheep. — 9.133.000 (Bethe) 12.090.000 (Cohnstein). 



Goat. — 9-10.000.000 (Sussdorf), 18.000.000 (Malassez), 19.- 

 000.000 (Hayem). 



Camel. — 10.930.000 (Hayem). 



Lama. — 13.186.000 (Hayem). 



Dog. — 4.092.000 to 5.644.000 (Stoltzing), 7.418.000 (Lyon). 



Cat, 6.857.000 (Sherrington), 9.900.000 (Hayem). 



Pig, 5.441.000 (Stoltzing), 8.668.200 (Wendelstadt and 

 Bleibtreu). 



