The author found an independent bone at the posterior portion of the pelvic symphysis in the coxae of cattle (cow) .
In the literature opinions on this independent bone differs more or less among some previous authors. In ruminants and non-ruminants the epiphysis on the inner border of the ischium has been investigated by A. CHAUVEAU & S. ARLOING (1873), WEYHE (1875) and S. SISSON & J.D. GROSSMAN (1959), and described by them as the interischial bone. R.N. WEGNER (1963) described the interpubal bone in coxae of both Antilocapra americana ORD 1815 and Tragulus javanicus OSBECK 1765, however, it seems to me the interpubal bone should be regarded as the interischial bone, considered from old osteological custom.
The author recognized clearly that an independent bone is situated on the coxae of cattle between the inner ischial borders by the observation of its cleavage lines (See Fig. 1) . Therefore, the author thinks that it is an interischial bone. The detailed features of the interischial bone are shown in Fig. 2.

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This report is the results of an inquiry of Chiroptera-Fauna from 1957 to 1961. There are two families, seven genera, ten species and subspecies of bats in Niigata pref. The following is a description of the observation on strange habitats and habits of the four species of bats, Miniopterus schreibersii fuliginosus HODGSON, Myotis macrodactylus TEMMINCK, Rhinolophus cornutus cornutus TEMMINCK and R. ferrum-equinumn mikadoi OGNEV, in Shojo Cave etc. The Myotis hangs down in the same manner as other bats do. However most of the Myotis are delivered of young and bring it up alone or in a colony in a crevice or gap in the cave. When different species form a colony, they always show the following relations in number of individuals Miniopterus> Myotis, Miniopterus<R. cornutus, Miniopterus<R. cornutus>Myotis. So I think that this condition is necessary to maintain a colony, and in this case, there are various terms of habits and habitats (shade, humidity, etc. also fluence the existance of a colony) .
I do not believe that competition, commensalism or amensalism, and predation exist in the colony.

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Mr. Y. Nakamura sent me a bat for identification. It was collected by him in Kofu City, Yamanashi Prefecture, 16 March, 1963. After careful examination, this specimen is identified as a female of Pipistrellus endoi of IMAIZUMI (1959) with three known locality records: Iwate, Saitama and Kanagawa Prefectures. Therefore, Yamanashi Prefecture is undoubtedly a new locality for this little known species of bat.

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