ferences among tne 17 varieties with which he experimented, including Shamo, 
Silky, Plymouth Rock, and others. 
1945 "A Chromosome Study of Anatidae": Hokk Teik Daig Shoho, C2))5 pp 18-22, 9 fig, Nov 
1945, 
The author gives the first cescription of the chromosomes of the following 
species: Anser albifrons, Branta bernicla, Dendronessa galericulata, Aix sponsa, 
Anas crecca, A. falcata, A, strepera, A. acuta, A. penelope, Spatula clypeata, 
Aythya fuligula, A. marila, Bucephala clangula, Clangula hyemalis, Melanitta 
fusca, M, nigra, Histrionicus histrionicus, and Mergus serrator. 

1945 "Two Examples of Sex-Abnormal Mallards*: Hokk Teik Daig Shoho (2), pp 31-32, 4 fig, 
Nov 1945 
A female mallard, six years after capture, assumed drake's plumage. On dissec- 
tion the ovaries were found to have become rudimentary, A second specimen, 
though of female plumage, was as large as the male, When after nine years this 
duck started assuming almost complete male plumage, it was dissected. Testes 
were found on the top of the paired ovaries, and microscopic examination showed 
sperms being formed, 
1945 "Karyotype Studies in Birds, 1, Comparative Morphology of Chromosomes in Seventeen 
Races of Domestic Fowl" (in English): Cytologia, XIII (3,4), pp 270-296, 47 fig, 
Dee 1944 (actual date of publication autumn, 1945), 
The chromosomes in 17 races of domestic fowl were examined morphologically to 
determine what, if any, cytological differences exist between them, (1) In 
their general characteristics the chromosoms of the races studied are fairly 
identical, both in number and in other morphological features, The male has 
78 chromosomes in the diploid and 39 in the haploid stage, while the female has 
77 in the diploid, (2) The constitution of the diploid complement is divided 
into two distinct size groups, macro-chromosomes and micro-chromosomes, There 
are 16 macro-chromosomes in the male and 15 in the female, consisting of two 
homologous pairs of extremely large V-shaped elements, a pair of long rod-shaped 
ones, a pair of J-shaped ones having subterminal attachments, a medium-sized 
distinct V-shaped element which is paired in the male cell and unpaired in the 
female cells and is obviously the sex-chromosome, and three pairs of short rod- 
shaped ones, The microxchromosomes, 62 in number, all appear to be telomitic 
in structure and vary in shape from short rods to minute grain-like bodiee in a 
graded series. (3) A close comparison of the ratio between the length of the 
long and short arms of the a- and b= chromosomes shows the ratio is always 
higher in the b= element than in the a- element, (4) The behavior of the germ 
cells in the testes of three inter-racial hybrids shows the chromosomes to be 
identical not only in external visible features but also in their inner consti- 
tution, 
1946 "On the Cuckoos": Hop Fub, I (6), pp 3-4, Jun 1946, 
The cuckoo's germ cell is bigger than that of the host species; therefore the 
cuckoo eggs hatch witnin a shorter time, 
1946 "The Chromosomes of Three Species of Phasianidae (Galli)": Seibutu, I (1), pp 
42-45, 1 fig, Feb 1946, 
The chromosome number of Gennaeus swinhoii and Meleagris gallapavo is 82 in the 
male and 81 in the female, and both show a striking morphological similarity to 
those of Phasianus colchicus, The chromosomes of Numida meleagris, 76 in the 
male and 75 in the female, are distinguishable from those of the common fowl in 
possessing two more V-shaped elements and four less rod-shaped ones, The numer- 
ical relationship between them is perhaps the result of the fusion of four rod- 
