Role of the median neurosecretory cells in the ovarian development of the blow fly Protophormia terraenovae I. Toyoda, H. Numata and S. Shiga 187
Physiology
Localization of the photoreceptor and pacemaker for the circadian activity rhythm in the band-legged ground cricket, Dianemobius nigrofasciatus S. Shiga, H. Numata and E. Yoshioka 193
Calling behavior modulates heartbeat reversal rhythm in the silkmoth Bombyx mori T. Ichikawa and K. Ito 203
Behavior Biology
Copulation duration and its genetic control in Drosophila elegans Y. Hirai, H. Sasaki and M.T. Kimura 211
Cocoon spinning behavior in the silkworm, Bombyx mori: Comparison of three strains constructing different cocoons in shape M. Kiyosawa, E. Ito, K. Shirai, R. Kanekatsu, M. Miura and K. Kiguchi 215
Acoustical and syntactical comparisons between songs of the white-backed munia (Lonchura striata) and its domesticated strain, the Bengalese finch (Lonchura striata var. domestica) E. Honda and K. Okanoya 319
Developmental Biology
Compensation for the lost prospective central nervous system by expansion of the prospective epidermis in the `16-cell' embryos of Xenopus laevis lacking all animal dorsal blastomeres M. Koga 225
Photo-activation of respiration in degenerated sperm of echiuroid oyster and sea urchin A. Fujiwara, E. Tazawa, Y. Kamata and I. Yasumasu 237
Purification and partial characterization of a lectin-like protein from the sea algae Laminaria diabolica that induces fertilization envelope formation in sea urchin eggs H. Nakamura and M. Moriya 247
Development of oriented motion in regenerating hydra cell aggregates M. Sato-Maeda and H. Tashiro 327
Hormonal reversal and the genetic control of sex differentiation in Xenopus S. Miyata, S. Koike and T. Kubo 335
Cell numbers in the gut of the embryo of the sea urchin Hemicentrotus pulcherrimus H. Mizoguchi 341
Endocrinology
Changes of pituitary proopiomelanocortin mRNA levels during metamorphosis of the bullfrog larvae T. Aida, S. Iwamuro, S. Miura and S. Kikuyama 255
Reproductive Biology
Switching from asexual to sexual reproduction in the planarian Dugesia ryukyuensis: bioassay system and basic description of sexualizing process K. Kobayashi, R. Koyanagi, M. Matsumoto, J.P. Cabrera and M. Hoshi 291
GnRH antagonist effects on follicle number and size in rat neonates and infants T.W. Muir, R.E. Leach, P.C. Roche, T.A. Gaffey, T.J. Kuehl, W.R. Dukelow and S.J. Ory 299
Annual correlative changes in some biochemical contents of seminal vesicle and testis in the catfish Clarias batrachus (L) M.S. Singh and K.P. Joy 345
Biochemistry
Extraction and partial characterization of pupal-cuticle-melanizing hormone (PCMH) in the swallowtail butterfly, Papilio xuthus L. (Lepidoptera Papilionidae) A. Yamanaka, K. Endo, H. Nishida, N. Kawamura, Y. Hatase, W. Kong, H. Kataoka and A. Suzuki 261
Cloning and characterization of cDNAs encoding trehalase from post-dormant embryos of the brine shrimp, Artemia franciscana S. Tanaka, F. Nambu and Z. Nambu 269
Tetrahymena elongation factor- binds to Hsp70 family proteins O. Numata, Y. Kurasawa and Y. Watanabe 279
Proteolytic activation of single-chain tissue-type plasminogen activator by protease/-macroglobulin complex isolated from human ovarian follicular fluid M. Murata, J. Ohnishi, T. Kudo, S. Wada, H. Yoshida, S. Fujimoto and T. Takahashi 285
Ecology
Faster growth of head size of pre-feeding larvae in a cannibalistic population of the salamander Hynobius retardatus A. Nishihara-Takahashi 303
Phylogeny
Genetic relationships of Japanese and Korean bagrid catfishes inferred from mitochondrial DNA analysis T. Okazaki, S.-R. Jeon, M. Watanabe and T. Kitagawa 363
Animal Diversity and Evolution
Genetic and conchological variation in Littorina sitkana Philippi (Mollusca, Gastropoda) on Northern Japanese coasts M. Nohara 309
Two tetranucleotide repeats within the Xq21.3/Yp11.2 human specific region of homology and their conservation in primate evolution H.-S. Kim, C. Winstanley, R.V. Wadekar, O. Takenaka, F. Mitsunaga, T. Kageyama, B.-H. Hyun and T.J. Crow 357
