1942 
1942 
1942 
20 
This resume of the study previously reported in Jap Jour ‘Gen, 1941, stresses o8e 
cytological aspects of the work rather than the genetic. 
"Birds of India and Australia": Yacho, IX (8), pp 494-502, text figs, Sep ly4z. 
A general account in popular vein of some 50 of the commoner tropical and sub- 
tropical Indonesian species, stressing thoee migrant forms common to both 
Australia and Japan such as the swifts, cuckoos, shearwaters, and Latham's snipe 
"On the Hybrid between the Domestic Fowl, Gallus gallue var. domesticus, and tue 
Common Pheasant, Phasianus colchicus" (with English resume): Jap Jour Gen, XVIII 
(5), pp 231-235, Oct 1942. 
This study of hybridization experiments between the domestic fowl and the common 
pheasant during 1939 and 1940 includes the record of breeding, morphology, and 
plumage of the hybrid birds and the results of histological examinations of their 
gonads. From various combinations of parents, 164 hybrid egys were obtained, of 
which 46 proved fertile. Nine unhatched embryos, 12 chicks, and 9 adult birds 
resulted. The most successful cross produced 37 percent fertile eggs. while other 
combinations averaged only 13 percent fertile. In the 46 fertile eggs obtained, 
the sex of unhatched embryos,as well as of those which matured, was determined, 
giving a sex ratio of approximately one to one. The mortality of female hybrids 
is very high during incubation and the early stages after hatching. The unusual 
excess of males reported by previous authors in similar crosses is believed the 
result of observing only those which matured. The feather patterns of the nybrid 
chicks between the red=hackled domestic fowl and the pneasant are intermediate 
between those of the chicks of each. In the cross between the male black shamo 
and the female pheasant the feather color is nearly black in both the chicke and 
the adult, indicating the gene of black shamo to be the dominant. Sex hormone in- 
jections were given to F,, males 24 months old, 0.5cc of puberogen and testosteron 
applied subcutaneously every other day and six times in all. After this injection 
the bare parts of the face looked young and fresh, but no influence upon the ac- 
tivity of the germ cells was apparent. 
"Birds of the Seven Islands of Izu": Tori, XI (53,54), pp 191-270, Dec 1942. 
The paper deals with a collection of 224 species made at seven-year intervals on 
nine islands in the Izu group. Only 18 percent of the total species are resident, 
66. percent are regular migrante. and 16 percent are considered vagrants. All the 
21 resident species except Turdus celaenops were derived from the Japanese main- 
land. 
Turdus celaenops is cnnfined to the Seven Islands and to Yakushima, south of Kyushu, 
and has two close relatives, T. dissimilis of Burma and Yunan and 2. seebohmi of 
Kina Balu, Borneo. These three species probably developed from a common ancestor. 
The Yaxushima form of I. celaenops is considered as ancestral to the Seven Islands 
race, because the geological formation of the Izu Islands is more recent. 
Torishima was famous for its unique breeding colony of Diomedea albatrus. In 
1889 about 40 immigrants settled there to gather feathers, and a small railroad 
was constructed to ship them from the interior of the island to the coast. Hach 
hunter killed from 109 to 200 albatrosses daily, and during one season from October 
to May 100,000 were destroyed. By 1898 the downhunters had increased to 300, but 
a@ great volcanic eruption in August 1902 killed the human inhabitants and disturbed 
the breeding ground of the albatrosses. At least 5,000,000 birds had been slaugh- 
tered in the preceding 12 years. 
In 1906 Steller's albatross was placed in the list of protected birds, but as 
the law could not be enforced on such a remote island, poaching went on openly. 
Yamashina visited the island in February 1929 and found a small colony of about 
2,000 birds. In Avril 1932, N. Yamada, Yamashtna's collector, found only a few 
hundred individuals and in April 1933 less than 100, the sudden decrease probably 
