Takashima, Haruo 
1942 "Suprlementary Note on Japanese Tube-Nosed Bat from Nagano Prefecture": Zool Mag, 
LIV (5), pp 191-192, May 1042, 
A brief note of a specimen of Murina hilgendorfi hilgendorfi captured in Nagano 
Prefecture, June 1941, 
Tanaka, Ryo 
1942 "A Biostatistical Analysis of Apodemus agrarius (Pallas) from Formosa with Special 
Ioference to its Systematic Characters" (in English): Mem Fac Sci Agr Taihoku Imp 
Univ, XXIII (6), pp 211-285, 27 fig, Sep 1942. 
A large series of specimens of Apodemus agrarius from the Taikoku Basin in 
northern Formosa wes studied biostatistically and compared with Rattus losea, 
(1, The richness of the reddish dorsal color and the markedness of the dorsal 
stripe are correlated and vary according to both ecological and genetic factors, 
(2) The approximate coincident periodicity in pelages and status of molts be- 
tween Apodemis and Rattus losea indicates they are referable to geographic rather 
than specific agents, (3) The breaks in relative growth of external measurements 
occur in harmony with the start of sexual maturity. (4) Features of growth varia- 
tion in skull measurements are similar in both species. (5) Sexual dimorphism in 
relative growth is not so marked in the mouse as in the rat, (6) The outer row 
cusps of molars of Apodemus are in vrocess of reduction. (7) From statisti- 
cal analysis of the synthetic variations in adult measurements, A, agrarius 
seems of a relatively homogenous genotype. (8) In adult measurements the male 
mouse generally exceeds the female mouse more frequently than in the rat, but 
the coefficients of variability in measurements are similar in both, except that 
the tooth dimensions are lower in the mouse, (9) The tail is not only always 
shorter than the heed and body length during growth but is markedly so in adult 
mean value of both sexes, (10) The adult mean value of the incisor index is 
smaller in the mouse, but its coefficient of variability is larger than in the 
rat, which is probably attributable to its grown variation, 
1944 "A Study of Muridae of Hainan Island": Report of the 2nd Scientific Expedition to 
Hainen Island carried out by the Taihoku Imperial University in 1942, pp 129-147, 
Mar 1944, 
The report includes: (1) historical sketches to the study of rats and mice in 
Hainan Island, (2) synopsis of the species of Muridae hitherto known from Hainan 
(11 species, only one of which, Rattus confucianus latipes, is endemic), and (3) 
comparative analysis of Rattus losea from Hainan and Formosa from the standpoint 
of variation-statistics, % 
1944 "Comparative Analysis of Two Species of Mus from Formosa from the Standpoint of 
Variation-Statistics" (in English): Mem Fac Sci Taihoku Imp Univ, I (1), pp 1-64, 
Apr 1944, 
The results of this detailed study on the comparative measurements of Mus musculus 
and Mus formosanus are summarized, (1) The differentiation between summer and 
winter pelages is greater in the field mouse than in the house mouse, (2) In the 
house mouse the tail is longer than the head and body length at all stages of de- 
velopment; in the field mouse the tail is longer at birth, but soon becomes equal 
to, and in the adult is shorter than, the head and body, (3) The énamel patterns 
of the molar cusps are more progressively reduced in the field mouse, (4) The field 
mouse tends to surpass the house mouse in size range of external dimensions, (5) 
While the variation. range of the incisor index is larger in the adult house mouse, 
its relative growth rate during post-natal development is greater in the field 
mouse, (6) No sex difference is recognizable in any attributive or quantitative 
character, (7) A determination of the true systematic status of the two forms is 
impossible until an extensive and profound investigation of the variation in both 
