66
M I C H A E L L O C K E
Adult
17
16
15
14
13
12
11
10
9
8
7
6
5
4
/
/
/
\
N
\;
[7~
k [•
\
\
\
3
2
1
20
19
18
b
\
\
\
A
A s\
\\
\\
l\
•
/
/
17
16
15
14
13
12
11
10
9
8
7
6
5
4
k
3
2
1
N
Γ
k
20
19
18
N
N
FIG. 33. Grafts of the intersegmental integument in Rhodnius.
Grafts were
made on the fifth instar and the effect observed in the adult, a: Implantations
of grafts containing an intersegmental membrane with normal orientation give
a variable result with respect to the graft; either a double or single pattern
may result. The double pattern is explained as the result of an interaction
between host and graft as predicted in b. The single pattern would result if there is
an anterior dominance in an isolated graft as predicted in c. When there is no interaction with the host, the anterior dominance within the graft asserts itself, b :
Numerical values have been assigned to the levels within the host and graft. The
arrows indicate the direction predicted for the distortion, c: Numerical values have
been assigned to the levels within an isolated graft. The arrows indicate the direction predicted for distortion of the ripple pattern if there is an intrinsic anterior
dominance. (After Locke, 1960b.)