Tlic Cat. Hemoglobin, 80%. Erythrocytes, 6,392,000 per 

 mi. in. in. Erythrocytes smaller than human, as a rule, regu- 

 lar in shape, variable in size. Each erythrocyte carries 62-100 

 as much hemoglobin as human erythrocytes. 



Leucocytes, 13,000 per cu. m. m. These stain mure feebly 

 than dues human blood. 



Large l.\ mphocytes, 7' , . or 910 per cu. m. m. 



Small lymphocytes, 68.6%, or 8,918 per cu. m. m. 



Mononuclear neutrophils, .6* < . or 78 per cu. m. m. 



Polymorphonuclear neutrophils, 20.6%, or 2.678 per cu. 

 in. in. 



Eosinophiles, 3.2%, or 416 per cu. m. m. 



No basophils were found. 



Serum hypotonic to human serum. 



Adult male guinea pig. 



Hemoglobin. 1 10* , . 



Erythrocytes. 6,216,000 per cu. m. m. Smaller than 

 human, but of the same form. Each erythrocyte carries 1.06 

 times as much hemoglobin as the human erythrocyte. 



Leucocytes, 6,500 per cu. m. m. 



Large lymphocytes, 2.4',, or 156 per cu. m. m. 



Small lymphocytes. 35.6< , . or 2,314 per cu. m. m. 



Mononuclear neutrophils, .2', . or 13 per cu. m. m. 



Polymorphonuclear neutrophils, 56.8%, or 3.692 per cu. 

 m. m. 



Eosinophiles. none found. 



Basophiles, (polymorphonuclear, granular) .4%, or 26 

 per cu. m. m. 



Amphophiles, 4.6' ; . or 2!)!) per cu. m. m. 



Many highly retractile granules are present. These may 

 be singly placed, or they may appear in groups of various 

 sizes. They do not stain in Hie eosinate solution. 



The serum is isotonic with human blood serum. 



Mouse, grown, young, male. 



Hemoglobin, 80%. 



Erythrocytes. 3,016,000 per cu. m. in. Erythrocytes 

 smaller than human, irregular in size and form, though always 

 saucer shaped and without nuclei. Each erythrocyte carries 

 1 2-3 times as much hemoglobin as the human erythrocyte. 



Leucocytes, 9,300 per cu. m. m. Of these. 94',. or s.742 

 per cu. m. in. are lymphocytes, resembling the large lympho- 

 cytes of human blood. 



Small lymphocytes, (>' , . or 55 per en. m. in. 



Xent rophiles and eosinophiles, absent. 



BaSOphileS, Yi'VY few. less than 1',. 



'Serum, hypotonic to human serum. 

 Adult hen. 



Hemoglobin not found. 



Erythrocytes, 1,992,000 per cu. m. m. The erythrocytes 

 of the non-mammals are oval, bi-convex, nucleated cells. 



73 



