Rercent progress in the generation of transgenic medaka (Oryziaslatipes) M. Tanaka and M. Kinoshita 615
ORIGINAL ARTICLES
Physiology
Effects of starvation and subsequent refeeding on formation andresorption of acellular bone in tilapia, Oreochromis niloticus Y. Takagi 623
Calcium imaging for detection and estimation of spike activities inAplysia Neurons R. Yoshida, A. Iwamoto and T. Nagahama 631
Circadian firing activities of neurosecretory cells releasingpheromonotropic neuropeptides in the silkmoth, bombyx mori M. Tawata and T. Ichikawa 645
Cardiac nervous system in the ostracod crustacean Vargulahilgendorfii Y. Ando, O. Matsuzaki and H. Yamagishi 651
Brain control of mating behavior in the male cricket Gryllusbimaculatus DeGeer: Excitatory control of copulatory actions Y. Matsumto and M. Sakai 659
Cell Biology
The photoreceptor molecules in Xenopus tadpole tail fin, inwhich melanophores exist Y. Miyashita, T. Moriya, K. Yamada, T. Kubota, S. Shirakawa, N.Fujii and K. Asami 671
The cDNA sequence and expression of the AAA-family peroxin genespex-1 and pex-6 from the nematodecaenorhabditis elegans S. Ghenea, M. Takeuchi, J. Motoyama, K. Sasamoto, Wolf-H. Kunau,T. Kamiryo and M. Bun-ya 675
Chromosomes of the lancelet Branchiostoma belcheri gray K. Saotome and Y. Ojima 683
Biochemistry
Expression of sperm-activating peptide IV receptor-associated membraneguanylyl cyclase in the testis of the sea urchin Diademasetosum S.H. Xu, S. Yamagami, K. Nomura and N. Suzuki 687
Developmental Biology
The ter|ter gonadal somatic cells cause apoptosis inter|ter primordial germ cells (PGCs) with normal survivabilityand proliferation ability in the mouse: Evidence from PGC-somatic cell``exchange-co-culture'' S. Takabayashi, M. Nozaki, K. Ishikawa and M. Noguchi 695
Normal embryonic stages of the chinese softshelled turtlePelodiscus sinensis (Trionychidae) M. Tokita and S. Kuratani 705
Ecology
First hydrothermal vent communities from the Indian Ocean discovered J. Hashimoto, S. Ohta, T. Gamo, H. Chiba, T. Yamaguchi, S.Tsuchida, T. Okudaira, H. Watabe, T. Yamanaka and M. Kitazawa 717
Phylogeny
Acid containers and cellular networks in the ascidian tunic with specialremarks on ascidian phylogeny E. Hirose 723
Taxonomy
Taxonomic status of the senkaku mole, Nesoscaptor uchidai, withspecial reference to variation in Mogera insularis from Taiwan(Mammalia: Insectivora) M. Motokawa, L.-K. Lin, H.-C. Cheng and M. Harada 733
Animal Diversity and Evolution
Ancient DNA analysis of brown bear (Ursus arctos) remains fromthe archeological site of Rebun Island, Hokkaido, Japan R. Masuda, T. Amano and H. Ono 741
