216
LEO LEME2
• BURMESTER ei el./*1/
•
FIG. 4. Number of leucocytes per cu.mm from their first appearance on the 4th day
of incubation till the 1st postembryonic day (A = adult hen). The differential count is
indicated by the subdivisions of each column of the graph. The abbreviations above the
columns indicate types of leucocyte which at that stage still occur only sporadically.
Hynek's number is for neutrophils from the 6th day, and for eosinophils from the 15th
day of incubation (after Lemei, 1955). Data of Burmester et al. (1941) indicate the total
numbers of neutrophils, lymphocytes, and leucocytes. Data by Parhon et al. (1956)
(lowermost curve) include neutrophils only. (Ne = neutrophils; Eo = eosinophils ;
Ba = basophils ; Ly = lymphocytes ; Mo = monocytes. )