YüSHIMARO TAN AK A igy 
Knobbedness. (Knobbed, K, v. smooth, k.) 
The presence of knobs is a striking characteristic of the Chinese race 
Lung-chiao tsau, which means "Dragon-horned silkworm". No prominent 
peculiarity is seen in the larvae until they have passed through the third 
moult, when the knobs come forth for the first time, and their full develop- 
ment is attained only in the last stage of larval life. The knobs are large, 
paired evaginations of the skin formed on the subdorsal lines of at least four 
segments, II, III, V, VIII ; sometimes they are present in all the segments 
from II to XI. The remnants of certain knobs are still visible in the pupal 
and imaginal stages. 
a) K and Z. 
Heterozygous knobbed normal-zebras (PPQAZzKkyy) mated inter sc. 
A 763' i 5 Exp. ratio 
Knob. norm. zebr. PQZK 186 9 
Smooth norm. zebr. PQZk 73 3 
Knob. norm. PQzK 62 3 
Smooth norm. POzk 21 1 
Total 342 
b) K and S. 
Heterozygous striped knobbed (SsPPQQKk) mated inter sc. 
A 762^5 
Exp. 
Str. knob. 
SPQK 
106 
9 
Str. smooth 
SPOk 
44 
3 
Norm. knob. 
sPQK 
39 ' 
5 
Norm, smooth 
sPOk 
5 
1 
Total 
194 
K and P, K and 
Q. 
Heterozygous normal knobbed whites (PpQ^Kkyy ) mated into' sc. 
A 760'! 5 Knobbed (K) Smooth (k) Totals 
Normal PQ 74 19 93 
