1. Aaronson, S. 1973. Digestion in phytoflagellates. In: Dingle, J. T., ed., Lysosomes in Biology and Pathology, Amsterdam, North-Holland, Vol. 3, pp. 18–37.
2. Ackerman, G. A. 1963. Cytochemical properties of the blood basophilic granulocyte. Ann. N.Y. Acad. Sci. 103:376–393.
3. Afzelius, B. A. 1977. Spermatozoa and spermatids of the crinoid Antedon petasus, with a note on primitive spermatozoa from deuterostome animals. J. Ultrastruct. Res. 59:272–281.
4. Afzelius, B. A., and Ferraguti, M. 1978. The spermatozoon of Priapulus caudatus Lamarck. J. Submicrosc. Cytol. 10:71–79.
5. Allison, A. C., and Hartree, E. F. 1970. Lysosomal enzymes in the acrosome and their possible role in fertilization. J. Reprod. Fertil. 21:501–515.