Mechanisms of egg activation and polyspermy block inamphibians and comparative aspects with fertilization in othervertebrates Yasuhiro I. 699
ORIGINAL ARTICLES
Physiology
G protein subunit genes in octopus photoreceptor cells Iwasa, T., Yanai, T., Nakagawa, M., Kikkawa, S., Obata, S., Usukura, J.,Tsuda, M. 711
L-Cysteine is a competitiveinhibitor of pyruvate kinase from the intertidal sipunculan, Phascolosoma arcuatum Teo, D. S. Y., Chew, S. F., Ip, Y. K. 717
Behavior Biology
Initial mate recognition in the Britishcabbage butterfly, Pieris rapaerapae Obara, Y., Majerus, E. N. 725
Studies on sex pheromones of thehelmet crab, Telmessus cheiragonus 1. An assay based onprecopulatory mate-guarding Kamio, M., Matsunaga, S., Fusetani, N. 731
Cell Biology
Correlation of photosynthetic products ofsymbiotic Chlorella with the mating reactivity rhythms in amutant strain of Parameciumbursaria Tanaka, M., Miwa, I. 735
Genetics
Stability andtelomere structure of chromosomal fragments in two different mosaicstrains of the silkworm, Bombyx mori Fujiwara, H., Nakazato, Y., Okazaki, S., Ninaki, O. 743
Developmental Biology
On the hatchingmechanism of quail embryos: Participation of ectodermal secretions inthe escape of embryos from the vitelline membrane Yoshizaki, N., Yamaguchi, W., Ito, S., Katagiri, C. 751
Reproductive Biology
Male internal fertilization andintrosperm-like sperm of the seaweed pipefish (Syngnathusschlegeli) Watanabe, S., Hara, M., Watanabe, Y. 759
Expression of-amyloid precursor protein in the porcine ovary Kimura, A., Kakinuma, K., Yonezawa, S., Takahashi, T. 769
Endocrinology
Hypoglycemia-induced catecholamine release fromadrenals in 21-day-old rats is blocked by hexamethoniumpretreatment Fujino, Y., Fujii, T. 779
Role of ecdysteroids in thedynamics of insect haemolymph sugar Oda, Y., Uejima, M., Iwami, M., Sakurai, S. 785
Extrapituitary expression of theprolactin gene in the goldfish, African clawed frog and mouse Imaoka, T., Matsuda, M., Mori, T. 791
Effect of 17-estradiol andtestosterone treatment on sex steroid binding proteins in the female ofthe green frog Rana esculenta Paolucci, M., Guerriero, G., Ciarcia, G. 797
Immunocytochemical analysis of pituitary cells in pre-spawning chumsalmon Salam, Md. A., Ando, H., Ban, M., Ueda, H., Urano, A. 805
Phytogeny
A new species of Edwardzetes (Acari, Oribatida, Ceratozetidae) from Biscay (TheBasque Country, Northern Spain) Iturrondobeitia, J. C., Caballero, A. I. 821
Animal Diversity and Evolution
Variation and plasticity of skeletal color in the zebracoral Oulastreacrispata Yamashiro, H. 827
Diet of a notodelphyid copepod inhabiting in analgal-bearing didemnid ascidian Diplosoma virens Hirose, E. 833
