32 
1944 
1944 
1345 
1945 
1946 
and constitution are described in detail and are correlated with the taxonomic 
peculiarities of the two forms, 7 
"The Chromosome Complex of the Pig (Sus scrofa) (Chromosome Studies in Domestic 
Mammals III)" (in English): Cytologia, XIII (2), pp 170-178, 10 Apr 1944. 
The chromosome complexes of two breeds of pig were investigated, The chromo- 
some number was found to be 40 in diploid and 20 in haploid. No visible dif- 
ference was found between the chromosomes of the two breeds, The low count 
of chromosome numbers given by previous authors is accounted for as a result 
of faulty preservation of material, The sex chromosomes of the pig are of the 
typical XY type, The X element is represented by one of the larger chromosomes 
of rod type, while the Y is very small, comparable to the smallest autosomes 
in size, 
"Karyotypes of Domestic Cattle, Zebu, and Domestic Water-Buffalo (Chromosome 
Studies in Domestic Mammals IV)" (in English): Cytologia, XIII (3,4), pp 247-264, 
30 Dee 1944, 
The chromosomes of the _ebu, Bos indicus, -.how no visibdle difference from those 
of domestic cattle, Bos taurus, in number (60 in diploid, 30 in haploid), form, 
or other morphological features, The karyotype of the water buffalo, Bubalus 
buffalus, is markedly dissimilar, having 48 chromosomes in the diploid and 24 
in haploid. The numerical and morphological differences between them are too 
great to be accounted for by either chromosome fragmentation or chromosome 
linkage, All these species are identical in the morphologital nature of the 
X and Y elements of the sex chromosomes, The mode of conjugation between the 
X and Y is peculiar and characteristic in all these bovine animals studied, 
"Notes on the Chromosomes of the Okinawa Fruit Bat": Hokk Teik Daig Shoho, (ie); 
p 13, 1 text fig, Aug 1945, 
Pteropus dasymallus inopinatus Kuroda has 38 chromosomes in the diploid sperma- 
togonia and 19 in the haploid spermatocytes, The nuclear type is highly con- 
plex, cansisting of V- and J-type chromosomes and one pair of large club-shaped 
chromosomes, The smallest pair appear at first to be of the club type also, 
but close observation shows them of the V type. The sex chromosomes are of the 
XY type. The X chromosome is J shaped, and its larger arm has a narrow stric- 
ture, The Y chromosomes are minute granules, which seem to conjugate with the 
long arm of the X chromosome at the first division, This is much more complex 
than the condition found in the Japanese Horse-Shoe Bat, Rhinolophus ferrun- 
equinum nippon, which has 29 chromosomes in the haploid, of a comparatively 
simple nuclear type, the X chromosome being club shapec, and the Y in minute 
granules, 
"Notes on the Chromosomes of the Nutria": Hokk Teik Daig Shoho, (1), p 14, 1 text 
fig, Aug 1945. 
ocastor coypus has 42 chromosomes in the diploid and 41 in haploid, The sex 
chromosomes are of the XY type, The X chromosome is V shaped, but the length 
of the arms is unequal, The Y element consists of three granular chromosomes, 
distinguished from two other homologous chromosomes by their larger size, At 
the first maturation division the Y element joins the end of the long arm of 
the X chromosome, 
Studies on Chromosomes of Domestic Birds and Animals (Kachiku to Kakin no Sensho- 
leu tai Kenkyu), 12mo, Sapporo, pp 1-96, 89 fig, 10 Nov 1946. 
Chromosomes of 31 Japanese domestic mammals and birds are described. Appendices 
contain a description of the investigative methods and a list of the known 
chromosome numbers of 82 wild mammals and 45 wild birds, 
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