1. Sperm development in the teleost Oryzias latipes

   • H. J. Grier

   OriginalPaper Pages: 419 - 431

2. Fine structure of the interplatelet area in the gills of the macrophthalmia stage of the river lamprey, Lampetra fluviatilis (L.)

   • Alan D. Pickering
   • R. Morris

   OriginalPaper Pages: 433 - 443

3. Microtubules associated with nuclear pore complexes and coated pits in the CNS

   • E. G. Gray
   • L. E. Westrum

   OriginalPaper Pages: 445 - 453

4. Fine structural observations on the protonephridium of the terrestrial triclad Geoplana pasipha

   • Marina Silveira
   • Anne Corinna

   OriginalPaper Pages: 455 - 463

5. The form and function of Cnidarian spirocysts

   • Richard N. Mariscal
   • Charles H. Bigger
   • Richard B. McLean

   OriginalPaper Pages: 465 - 474

6. Further histophysiological observations on the lower esophagus of the rabbit

   • Aldo Cecio
   • Giuseppe Califano
   • Roberto Lobello

   OriginalPaper Pages: 475 - 488

7. The discrimination of nine different types of synaptic boutons in the fundus striati (nucleus accumbens septi)

   • R. Hassler
   • J. W. Chung

   OriginalPaper Pages: 489 - 505

8. Ultrastructure and permeability of lymph node microvasculature in the mouse

   • B. van Deurs
   • C. Röpke
   • E. Westergaard

   OriginalPaper Pages: 507 - 525

9. Ultrastructural modifications of renal cells in the three-spined stickleback (Gasterosteus aculeatus L.) after castration

   • J. P. Mourier

   OriginalPaper Pages: 527 - 548

10. Ultrastructural study on the hypothalamic-hypophysial-adrenal axis in fetal rats

    • S. Daikoku
    • M. Kinutani
    • M. Sako

    OriginalPaper Pages: 549 - 559