1. Comparative morphometrics of the acrosomes of the sperms of “externally” and “internally” fertilizing sperms of the shipworms (teredinidae, bivalvia, mollusca)

   • J. D. Popham

   OriginalPaper Pages: 291 - 297

2. Effects of nerve growth factor and its antiserum on axonal regeneration of short adrenergic neurons in the male mouse

   • Bo Bjerre
   • Evald Rosengren

   OriginalPaper Pages: 299 - 322

3. Multinucleate spermatids in the mouse

   • D. R. Johnson

   OriginalPaper Pages: 323 - 329

4. Ultrastructural localization of concanavalin a binding sites on the surface of differentiating hemopoietic cells

   • G. Adolph Ackerman
   • Samuel D. Waksal

   OriginalPaper Pages: 331 - 342

5. An ultrastructural analysis of early fertilization in the sand dollar, Echinarachnius parma

   • R. G. Summers
   • B. L. Hylander

   OriginalPaper Pages: 343 - 368

6. Dissolution and removal of neuronal lipofuscin following dimethylaminoethyl p-chlorophenoxyacetate administration to guinea pigs

   • Mahdi Hasan
   • Paul Glees
   • Polly E. Spoerri

   OriginalPaper Pages: 369 - 375

7. The sarcolemma of skeletal muscle fibres as demonstrated by a replica technique

   • Henning Schmalbruch

   OriginalPaper Pages: 377 - 387

8. Ultrastructural analysis of the human cerebral ventricular system

   • David E. Scott
   • David H. Van Dyke
   • Gerald P. Kozlowski

   OriginalPaper Pages: 389 - 397

9. Cell junctions in Bowman's capsule in developing rat and human kidney

   • Monique A. Ryser
   • William A. Webber

   OriginalPaper Pages: 399 - 407

10. Electron microscopic investigation of synaptic organization of the trochlear nucleus in cat

    • I. J. Bak
    • W. B. Choi

    OriginalPaper Pages: 409 - 423