Experiments with Snails, Moths, and Beetles 145 
having white worms, yellow cocoons, and white moths. All of 
the worms were black, half of the cocoons were yellow, and half 
were white (180 and 188), without any intermediate ones. 
In a fourth case an individual (female) with white worms, 
cocoons, and moths was crossed with another (male) having 
black worms and moths, but yellow cocoons. All the cocoons 
were white. The worms were 265 black like the father and 
253 white like the mother; some of the moths were white, others 
black, others intermediate. In the group of 265 black worms 
there were no more black moths than in the group of 253 white 
worms. Thus the characters black or white worms and the 
characters black or white moths have no mutual relation. 
In a fifth case, the female of a variety ‘‘ Jaune Var” was used 
that has the black character of the worm and of the moth almost 
completely “‘fixed,’’ but fixed only recently, while the yellow of 
the cocoon had been fixed for a long succession of generations. 
The male was of the race “Blanc des Alpes” and had white 
characters throughout. The result of the cross gave white co- 
coons, the paternal type — the reverse of what occurred in other 
cases where the white was maternal. The worms were 258 
white like the father and 182 striped like the mother (3 to 1). 
This predominance Coutagne attributes “to the ancestors of 
the white worms of the mother; possibly if the striped char- 
acter had been fixed for a greater number of generations there 
would have been an equality between the white and striped 
worms.’? The questionable character of this explanation is at 
once apparent in the next experiment that Coutange gives, in 
which the same types were crossed as before and all the worms 
were striped. 
(6) It has been found that white cocoons dominate over yellow, 
but in another combination the reverse was found to be the case, 
showing that there is no absolute rule for all races in regard to 
the inheritance of white versus yellow. 
(7) After crossing individuals of two races which give offspring 
showing the character of one parent, it often happens that the 
concealed character reappears in the following generations. 
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