158 SPOLIA ZEYLANICA. 
FURTHER NOTES ON THE HYBRIDIZATION 
EXPERIMENTS WITH THE CEYLON JUNGLE FOWL. 
By J. Luswettyn Tuomas, F.R.C.8.ENa. 
HE previous article on this subject brought the experiments 
up to the date of Ist June, 1906. This present note brings 
them up to Ist June, 1907. 
One or two omissions in the first report have been pointed out 
by some of the experimenters, and must be recorded here as they 
have a bearing on the claim of the Gallus Stanleyi to recognition 
as a primitive stock of domestic fowls. Further, since the publi- 
cation of the first report, success has been achieved which alters 
the whole aspect of the question. To deal with the two omissions : 
first, one of the experimenters, Mr. Clement Johnson now in 
England, has written giving information regarding experiment 
No. 5, Hybrid Hen and Jungle Cock. On page 25 (Spolia Zeylanica, 
vol. IV.) it was stated that “ At Hunasgiriya Mr. Johnson put a 
hybrid pullet to his famous jungle cock (daughter to father), but as 
there were domestic hens in the run no attention was paid to this 
hybrid ; and her eggs were naturally infertile.” 
Mr. Johnson writes that for a whole twelve month the jungle 
cock was faithful to one single domestic hen and neglected all the 
other domestic hens in the same run, but that as soon as he placed 
two of his hybrid pullets into this run the cock became on intimate - 
terms with them both, as well as with his favourite domestic, 
and trod all three freely, thus clearly proving that the jungle 
cock is not always monogamous even in captivity. 
Further, Mr. Johnson states that in the first batch of eggs which 
one of these hybrid pullets laid after running with the jungle cock, 
there were two which proved to be fertile though no chickens 
were hatched out. This is a clear indication that the hybrid hens 
are not sterile when mated back to the jungle parent, and gives 
hope of successfully producing chickens when this experiment 
shall be tried again. 
Another omission was with regard to experiment No. 3, Hybrid 
Cock and Hybrid Hen (p. 25). It should have been mentioned 
that in March, 1906, in the Queensdown run, one egg of a batch 
laid by the hybrid hen was broken by mistake during the period 
