Biomineralization of the spicules of sea urchin embryos F.H. Wilt 253
ORIGINAL ARTICLES
Cell Biology
Mutual and directional allogeneic cytotoxic reaction of hemocytes in thesolitary ascidian Halocynthia roretzi revealed by one-stepquantitive fluorimetric assay M. Arai, M. Suzuki-Koike, S. Ohtake, H. Ohba, K. Tanaka and J.Chiba 263
In vitro cultivation of cells from ovotestis tissue ofpigmented Biomphalaria glabrata Y. Iwanaga 271
Biochemical and immunohistochemical studies on tropomyosin and glutamatedehydrogenase in the chicken liver S. Akutsu and J. Miyazaki 275
Molecular Biology
Molecular characterization of a cDNA from the silk moth Bombyxmori encoding Manduca sexta allatotropin peptide C. Park, J.S. Hwang, S.W. Kang and B.H. Lee 287
Biochemistry
Molecular cloning of a putative gastric chitinase in the toadBufo japonicus H. Oshima, R. Miyazaki, Y. Ohe, H. Hayashi, K. Kawamura and S.Kikuyama 293
Development Biology
Role of cell contact in the specification process of pigment foundercells in the sea urchin embryo H. Takata, T. Kominami and M. Masui 299
Aryl hydrocarbon receptor is required for prevention of blood clottingand for the development of vasculature and bone in the embryos of medakafish, Oryzias latipes T. Kawamura and I. Yamashita 309
Reproductive Biology
Comparative studies between in vivo and in vitrospermatogenesis of Japanese eel (Anguilla japonica) T. Miura, N. Ando, C. Miura and K. Yamauchi 321
Endocrinology
Effects of starvation on gonadotropin and thyrotropin subunit mRNAlevels and plasma hormone levels in the male Japanese quail (Coturnix coturnix joponica) M. Kobayashi and S. Ishii 331
Ecology
Fluctuation in abundance and age structure of a breeding population ofthe Japanese brown frog, Rana japonica Günther (Amphibia,Anura) J. Marunouchi, T. Kusano and H. Ueda 343
A quantitative analysis of geographic color variation in twoGeotrupes dung beetles T. Watanabe, T. Tanigaki, H. Nishi, A. Ushimaru and T. Takeuchi 351
Taxonomy
Loxocorone, a new genus of the family Loxosomatidae(Entoprocta: Solitaria), with descriptions of two new Loxomitra(sensu stricto) and a new Loxocorone from Okinawa, theRyukyu Archipelago, Japan T. Iseto 359
Genetic relationships among Korean brown frog species (Anura, Ranidae),with special reference to evolutionary divergences between two alliedspecies Rana dybowskii and R. huanrenensis J.-B. Kim, M.-S. Min, S.-Y. Yang and M. Matsui 369
