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Journal of the Speleological Society of Japan


Volume 2

On the Systematic Position of Neanops caecus (Coleoptera,Trechinae)
Neanops caecus (BRlTTON), an anophthalmic trechine beetle from limestone caves in the North Island of New Zealand, is redescribed mainly on the basis of newly obtained specimens. It is concluded that the genus Neanops belongs to the homaloderoid line of the tribe Trechini and is not at all related to Duvaliomimus, though it is much isolated in the genus-group. The peculiarity is above all pronounced in the strange modification of male protarsus and the unique structure of aedeagal apical orifice. Its ancestor may have immigrated from Australia across the sea, but since none of the Australian and Tasmanian genera seem very close to Neaitops, its colonization in New Zealand must have been effected in a remote past.
TWO New Water-Mites (Acari, Hydrachneliae) from Cave Waters in New Zealand
A new subfamily Zelandopsinae subfam. nov., belonging to Aturidae, and two new species, Zelandopsis morimotoi gen. et sp. nov. and Mideopsis (s. str.) forkensis sp. nov., are described from cave waters in Twin Forks Cave, Twin Forks Creek, Paturau, NW Nelson, New Zealand. The former species seems to be troglobiontic and the latter troglophilous.
The First Discovery of Fossil Hamster in Japan

A tooth of hamster was found from the fissure-filling sediments of the Akiyoshi Area. West Japan. It is the first record of fossil hamster in Japan. The material is represented by a single isolated lower third molar, which is identified with Cricetulus sp. The morphological characters of the material are fairly similar to those of Cricetulus triton (DE WINTON). The geological age of the material is thought to be the Middle Pleistocene. It is assumed that hamsters migrated into the Japanese Islands at the time when the land connection with the Continent was present and the climate might be more continental than today.

A Fossil Tooth of Naumann's Elephant from Uyama-do, Atetsu Karst Plateau, Okayama Prefecture, Japan

A fossil tooth of the elephant, Palaeoloxodon naumanni, was yielded from a Late Pleistocene cave deposit in Uyama-do, Atetsu Karst, in August 1967. Descriptions are given of the fossil specimen and an outline of the cave deposit. From the size and morphological features of the tooth (Ieft lower 4th molar), it is concluded that the elephant was a semi-adult.

Geology and Speleology of the Inazumi-yama District, Mie-machi, Ono-gun, Oita Prefecture, Japan
 Geology and Speleology of the Inazumi-yama District. Mie-machi, Ono-gun, Oita Frefecture, Japan

The geology and speleology of the Inazumi-yama district, Mie-machi, Ono-gun, Oita Prefecture, are briefly described. The Inazumi Formation is composed of thick limestone and sandstone, slate and chert and is more than 650 meters in thickness. The formation is correlated with the lower Lower Permian to upper Middle Permian on the basis of fusulinan fossils in the limestone. The main part of Inazumi Cave is considered to have developed as a typical phreatic cave and ornamented by secondary formations in the wake of degression up to the accumulation of the Aso welded-tuff (ASO 4A), and since then submerged.

 Chemical components of the ground-water in and around Inazumi Cave are shown in Table 1. The relationship between calcium-magnesium and hydroger carbonate and that between sodium-potassium and silicic acid content are respectively discussed.

 On Some Calcium-Magnesium Carbonate Spereo-Minerals in Yugoslavia and Korea
.The carbonate speleothems from some selected caves of Yugoslavia and Korea were studied with regard to their mineral association with the calcium-magnesium carbonate. X-ray diffraction analysis revealed that six minerals account for the carbonate speleothems : aragonite, calcite, high magnesian calcite, protodolomite, dolomite and hydromagnesite. The present study attempts to evaluate the relationship between the calcium-magnesium carbonate and the evolutional changes of speleothem-forming solutions based on the mineral assemblage and the natural occurrence.