Vii VOL17U5- AMPRIEL 1 991 CONTENTS page Rizk, NABILN. The arcuate line of the rectus sheath — does it exist? Moss-SALENTIJN, LETTY, KEMBER, N. F., SHINOZUKA, M., Wu, W. F. and BosgE, ANJANA. Computer simulations of chondrocytic clone behaviour in rabbit growth plates NUGENT, S. G., OSULLIVAN, V. R., FRAHER, J. P. and REA, B. B. Central-peripheral transitional zone of the spinal accessory nerve in the rat JOAZEIRO, P. P. and MonrTES, G. S. Morphological distinction between filaments that converge upon desmosomes and those that are attached to hemidesmosomes in the epidermis of anuran larvae and lampreys 27 CHAN, W. Y. Intraocular growth and differentiation of tissue fragments isolated from primitive streak-stage mouse embryos 41 Drupy, LOUISE, SHEPPARD, BRIAN L. and BONNAR, JOHN. The ultrastructure of mast cells in the uterus throughout the normal menstrual cycle and the postmenopause 51 OcGuRA, ATSUO, NISHIDA, TAKAO, HAYASHI, YOSHIHIRO and MOCcHIDA, KEIJI. The development of the uteroplacental vascular system in the golden hamster Mesocricetus auratus 65 ONG, W. Y. and Garey, L. J. Ultrastructural characteristics of human adult and infant cerebral cortical neurons 79 WILD, J. MARTIN, JOHNSTON, B. M. and GLUCKMAN, P. D. Central projections of the nodose ganglion and the origin of vagal efferents in the lamb 105 MaIna, J. N. A morphometric analysis of chloride cells in the gills of the teleosts Oreochromis alcalicus and Oreochromis niloticus and a description of presumptive urea-excreting cells in O. alcalicus 131 ABE, HIROYUKI and OIKAWA, TANEAKI. Regional differences in the ultrastructural features of secretory cells in the golden hamster (Mesocricetus auratus) oviductal epithelium 147 AMONOO-KvoFI, H. S. Morphometric changes in the heights and anteroposterior diameters of the lumbar intervertebral discs with age 159 FLORANCE, R. S. K., SENIOR, P. V., BYRNE, S. and BECK, F. The expression of IGF-II in the early post-implantation rat conceptus 169 RICHARDSON, K. E., WOOLLER, R. D. and CasorTTI, G. The relative sizes and asymmetry of kidneys in passerine birds from Australia and North America 181 Vili Contents MAYHEW, TERRY M. Scaling placental oxygen diffusion to birthweight: studies on placentae from low- and high-altitude pregnancies MULLER, W. and FIRSCHING, R. Demonstration of elastic fibres with reagents for detection of magnesium Fuss, FRANZ K. The ulnar collateral ligament of the human elbow joint. Anatomy, function and biomechanics SIMKIN, PETER A., HESTON, THOMAS F., DOWNEY, DANIEL J., BENEDICT, RICHARD S. and CHOI, HWAN Soo. Subchondral architecture in bones of the canine shoulder Boya, J., CALVO, J. L., CARBONELL, A. L. and BORREGON, A. A lectin histochemistry study on the development of rat microglial cells SHIOJIRI, NOBUYOSHI and TAKAHASHI, MASATOSHI. Lymphoid follicle formation in the bursa of Fabricius of the chick embryo STOCKWELL, R. A. Morphometry of cytoplasmic components of mammalian articular chondrocytes and corneal keratocytes: species and zonal variations of mitochondria in relation to nutrition MATTHEW, CARA ANN and Moore, M. J. Collagen fibril morphometry in transected rat extensor tendons CHELL, J. ANATOMICAL Note. The squamoso-petrous sinus: a fetal remnant Book REVIEWS CORRECTION