All Taramelliceras species hitherto reported from the Somanakamura Group are more or less crushed or fragmentary and exact morphology of the whorls could not be described in detail. A relatively well preserved specimen of Taramelliceras sp. was found from a float in a locality in Fukono, Minami-Soma City, which probably came from the uppermost part of the Tatenosawa Sandstone Member of the Nakanosawa Formation of the Somanakamura Group. The specimen is unfortunately an immature shell, but is not affected by deformation after burial. It is a rare case for Taramelliceras from the group to be capable of detailed morphological analysis, and is therefore worth reporting herein for future reference. It belongs to the evolute, weakly ornamented group of Taramelliceras, and is possibly assigned to T. rigidum (Wegele).
The ectoparasitic isopod, Zonophryxus retrodens Richardson, 1903, is recorded for the first time from Japan. This species is distinguished from other congeners mainly in the following combination of characters: elongate oval body, 5 dorsal traces of segmentations on pereon, 3 pairs of notches on lateral margins of anterior half of the body in female, broad ventral flange in female; and ovoid pleotelson without uropods in male. This study provides additional information on this species, including a description, host, coloration, and scanning electron micrographs.
The subgenus Limbusa, which is assigned to the genus Euthalia (Lepidoptera, Nymphalidae), is revised in three groups, 59 species and 78 subspecies up to now. In this part, the systematic arrangement and the group division are briefly discussed. One hundred and eighteen taxa (including one manuscript name) which have been described are listed with figures. Lectotypes are designated for Adolias thibetana Poujade and Euthalia aristides Oberthür.
The osteological description and illustrations of the cyprinid fish Xenocypris argentea from Taoyuan, Hunan Province and Guixi, Jiangxi Province, China are provided for studies on fossil cyprinid fishes found in East Asia and Japan including Iki Island, Nagasaki Prefecture, with brief comparison to a cultrin species, Hemiculter leucisculus and some other xenocyprinin genera and species.
A fossil of large canine tooth has been discovered from the Ideyama Formation, Otsuji Group, at road cut in Tonno district, Nogata City, Kyushu. The double cutting edges on the distal face of canine and other features indicate that the fossil belongs to large amynodontids. In Japan, Zaisanamynodon borisovi was reported from the Middle to Upper Eocene bed in Hyogo Prefecture. Adding to that, several amynodontid fossils have been reported from the Eocene to Oligocene beds in Hokkaido, Yamaguchi and Saga Prefectures. These occurrences show wide distribution and longtime range of amynodontids in Japan. There is another fossil tooth of a rhinocerotoid from the Nogata Group, at Inazuki, Kama City. The tooth has already been reported without description. In this report, the tooth is also described for the future research.