Regulation of gonadotropin receptors and its physiological significance in higher vertebrates Tsutsui, K., S. Kawashima 351
Gonadotropin-releasing hormone: present concepts, future directions Rastogi, R. K., L. Iela 363
Physiology
Effects of rapid cooling on heart rate of the Japanese lobster in vivo Nakamura, M., M. Tani, T. Kuramoto 375
Effectiveness of metoclopramide, domperidone and ondansetron as antiemetics in the amphibian, Xenopus laevis Naitoh, T., M. Matuura, R. J. Wassersug 381
Electrical responses of non-taste cells in frog tongue and palate to chemical stimuli Sata, O., T. Sato 385
Cell Biology
Immunogold colocalization of opsin and actin in Drosophila photoreceptors that undergo active rhabdomere morphogenesis Arikawa K., A. Matsushita 391
Experimental perturbations of the Litonotus-Euplotes predator-prey system Ricci, N., F. Verni 399
Biochemistry
Immunochemical studies of an actin-binding protein in ascidian body wall smooth muscle Ohtsuka, Y., H. Nakae, H. Abe, T. Obinata 407
Developmental changes in pteridine biosynthesis in the toad, Bufo vulgaris Takikawa, S., M. Nakagoshi 413
Developmental Biology
Neural crest development in reptilian embryos, studied with monoclonal antibody, HNK-1 Hou, L., T. Takeuchi 423
The second maturation division and fertilization in the spider Achaearanea japonica (Bös. et Str.) Suzuki, H., A. Kondo 433
Neuron-like morphology expressed by perinatal rat C-cells in vitro Nishiyama, I., T. Oota, M. Ogiso 441
Endocrinology
Glutamate substitution for glutamine at position 5 or 6 reduces somatostatin action in the eel intestine (RC) Uesaka, T., K. Yano, M. Yamasaki, M. Ando 491
Proliferation of pituitary cells in streptozotocin-induced diabetic mice: effect of insulin and estrogen Takahashi, S., S. Oomizu, Y. Kobayashi 445
Molecular evolution of shark C-type natriuretic peptides Takano, M., Y. Sasayama, Y. Takei 451
Systematics and Taxonomy
Systematic study on the Chaenogobius species (family Gobiidae) by analysis of allozyme polymorphisms Aizawa, T., M. Hatsumi, K. Wakahama 455
Speciation of Japanese pond frogs deduced from lampbrush chromosomes of their diploid and triploid hybrids Ohtani, H. 465
Karyotypes and Ag-NOR variations in Japanese Vespertilionid bats (Mammalia: Chiroptera) Ono, T., Y. Obara 473
Acoustic characteristics of treefrogs from Sichuan, China, with comments on systematic relationship of Polypedates and Rhacophorus (Anura, Rhacophoridae) Matsui, M., G. Wu 485
