1. Index autorum

   Legacy 01 October 1973 Pages: ii - ii

2. Egg laying studies on some british sciomyzid flies (Diptera: Sciomyzidae)

   • Ookeow Beaver

   OriginalPaper 01 October 1973 Pages: 1 - 12

3. The reproductive cycle in a typical estuarine mollusc Nausitora hedleyi Schepman based on a study of the Gonad Index

   • M. Saraswathy
   • N. Balakrishnan Nair

   OriginalPaper 01 October 1973 Pages: 13 - 28

4. Development of cysts in Mallomonas eoa examined by scanning electron microscopy

   • Gertrud Cronberg

   OriginalPaper 01 October 1973 Pages: 29 - 38

5. The biological cycles of pelagic copepods in the lakes of Kamchatka

   • I. I. Kurenkov

   OriginalPaper 01 October 1973 Pages: 39 - 44

6. Population dynamics of growth of young sockeye salmon in Lake Dalnee

   • F. V. Krogius

   OriginalPaper 01 October 1973 Pages: 45 - 51

7. Ecological factors influencing macroinvertebrate standing crop distribution

   • Willard E, Barber
   • Niles R. Kevern

   OriginalPaper 01 October 1973 Pages: 53 - 75

8. Effects of Environmental Perturbations on Short-Term Phytoplankton Production off Lawson's Bay, A Tropical Coastal Embayment

   • D. V. Subba Rao

   OriginalPaper 01 October 1973 Pages: 77 - 91

9. The status of Agardhiella tenera and Agardhiella baileyi (Rhodophyta, Gigartinales)

   • Michael J. Wynne
   • Wm. Randolph Taylor

   OriginalPaper 01 October 1973 Pages: 93 - 107

10. Eutrophication of a Tropical African Impoundment (Lake McIlwaine, Rhodesia)

    • B. E. Marshall
    • A. C. Falconer

    OriginalPaper 01 October 1973 Pages: 109 - 123

11. Effect of different light intensities on growth, reproduction, amino acid synthesis, fat and sugar contents in ulva fasciata delile

    • A. F. Mohsen
    • A. H. Nasr
    • A. M. Metwalli

    OriginalPaper 01 October 1973 Pages: 125 - 135

12. Ecology of Diaptomus leptopus s. a. Forbes 1882 (Copepoda: Calanoida) under temporary pond conditions

    • F. I. O'Brien
    • J. M. Winner
    • D. K. Krochak

    OriginalPaper 01 October 1973 Pages: 137 - 155

13. Effect of sex and size on the protein composition in the tissues of the freshwater crab, Paratelphusa (Barytelphusa) guerini Milne Edwards

    • S. A. T. Venkatachari
    • N. E. Ambore

    OriginalPaper 01 October 1973 Pages: 157 - 169

14. On edible Lemanea Bory de St Vincent — a fresh water red alga from India

    • M. Khan

    OriginalPaper 01 October 1973 Pages: 171 - 175

15. On a new species of Hapalosiphon naegeli (Myxophyceae)

    • G. L. Tiwari

    OriginalPaper 01 October 1973 Pages: 177 - 182

16. Transversotrema Chackai sp. Nov, adult of Cercaria Chackai, from Fishes (Digenea: Transversotrematidae)

    • A. Mohandas

    OriginalPaper 01 October 1973 Pages: 183 - 188

17. Algal ecology of a stream polluted through gold mining on the Witwatersrand

    • Florence D. Hancock

    OriginalPaper 01 October 1973 Pages: 189 - 229

18. A note on two liquid scintillation fluors useful for primary production work

    • Don T. Waite
    • H. C. Duthie
    • J. R. Matthews

    OriginalPaper 01 October 1973 Pages: 231 - 234

19. Etude des fluctuations annuelles des copépodes et du phytoplancton dans la manche et le golfe de gascogne par la méthode d'analyse de la variance et du coefficient de correlation

    • Sami Lakkis

    OriginalPaper 01 October 1973 Pages: 235 - 252

20. Seasonal and annual variations in biological regime of lakes in an ultracontinental climate (Trans-Baikal Region of U.S.S.R)

    • B. A. Shishkin

    OriginalPaper 01 October 1973 Pages: 253 - 261

21. Libri novi

    BookReview 01 October 1973 Pages: 263 - 271

22. Announcements

    Announcement 01 October 1973 Pages: 272 - 272