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Journal of the Speleological Society of Japan


Volume 11

Shun-Ici UENO
The Group of Trechiama chikaichii (Coleoptera, Trechinae)
 Anophthalmic trechine bcetles belonging to the group of Trechiama chikaichii are enumerated. Of the seven species hitherto known, two are new to science and are described under the names of T. Iongicollis and T. acutidens. New records are given for two of the other five, and a key to all the species and subspecies is prepared. With the exception of T. kawanoi, all the species have been known from either caves or mines, and a half of them are also found in upper hypogean habitats.
Shun-Ici UENO
A New Anophthalmic Trechiama (Coleoptera, Trechinae) Found in Mine Adits of Northeast Japan
 A new anophthalmic trechine beetle is describcd from prospecting adits of a gold mine in the vicinity of Yonezawa City in Northeast Japan, under the name of Trechjama balli. It belongs to the echigonis complex of the group of T. habei, and is closely related to T. accipitris and T. kusakarii.
Two New Quedius (Coleoptera, Staphylinidae) from the Upper Hypogean Zone of Central Honshu, Japan 
Two new staphylinid beetles belonging to the group of Quedius (Microsaurus) abnormalis are described and illustrated. One of them was found in the upper hypogean zone of Mt. Daibosatsu, while the other was collected from Hirogawara at the foot of Mt. Kita-dake, both in Yamanashi Prefecture, central Honshu, Japan.
Supplementary Notes on Japanese Nesticid Spiders  
 A new nesticid spider is described from the northern side of Central Japan under the name of Nesticus echigonus. Measurements and illustrations of Nesticus monticola are corrected as regards the female.
A New Eyeless Leptonetid Spider from an Abandoned Conduit in Northeastern Shikoku, Southwest Japan 
  A new eyeless leptonetid spider is described from an abandoned conduit in northeastern Shikoku, Southwest Japan, under the name of Leptoneta bandoi. It is not unlike L. yamauchii, but differs from it in the absence of eyes and in the conformation of male palp.
Kensaku URATA
Some Remarks towards the Underwater Speleology in Japan
 The Ginga-do cave system lies in the southern area of Tokuno-shima, the Ryukyus. The total length of the cave system surveyed by Kyushu University Exploration Club in 1984 went up to 2,324 m. The development of this cave system was controlled by the unconformable boundary between the porous and permeable Quaternary Ryukyu Limestone and the underlying phyllite basement, and especially by the topographic features of the basement such as valleys. The cave system contains many solution features of phreatic origin, and therefore, cavities were opened initially in the phreatic zone above the boundary. The development to the groundwater-table type cave and a vadose cutting into the non-calcareous basement are also recognized in the fairly early stage of development of the cave system. The sediments remaining as terraces was due to the sea-level change after enlargement of the cave system. The characteristic shape of the cave system like a fork may have resulted from the topographic feature of the besement and/or the consolidation inhomogeneity of the Ryukyu Limestone. The origin of the differential dissolution of the limestone was discussed in detail on the basis of geological characteristics of the Ryukyu Limestone.
Naruhiko KASHIMA, Moo Song SUH, Hong Youl HAHN, Michio KATO and Takuro HIRAOKA
Speleo-Minerals in the Mungyeong Karst Area, South Korea
 This study investigates the speleo-minerals in five limestone caves of the Mungyeong Karst Area lying on Mungyeong-gun of Gyeongsangbug-do in South Korea. The Mungyeong Karst is developed in a sequence of the Ordovician limestone (the Pugong-ri Formation) (KIM et al. , 1967). Powder x-ray diffraction analysis and scanning microscopic scrutinies of samples proved that six speleo-minerals were accounted for carbonate minerals (calcite, dolomite, ankerite) and phosphate minerals (brushite, hydroxylapatite, taranakite). Ankerite is reported as a new finding from the limestone cave environment in South Korea.
Kazubisa YOSHIMURA and YUAN Daoxian
Chemical Components of Groundwaters in the Guilin Area in China
 This is a short communication on the chemical composition of river and groundwaters in the Guilin area in China. Chemical components in water arise from carbonate rocks, calcium sulfate supplied by gypsum and/or the oxidation of sulfide ores, rain water and dry-fallout, and non-carbonate rocks. The contents of the major components, calcium and hydrogen carbonate ions, are somewhat higher than those of groundwaters from Akiyoshi-dai (Plateau) in Japan. This may be due to higher production rate of carbon dioxide in soils because of higher annual mean temperature in the Guilin area by 3'C.