• Volume 4, Issue 3

      September 1936,   pages  1-281

    • Errata

      V Ramanatha Ayyar R Balasubramania Iyer

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    • The life-history ofChenopodium album Linn.

      H R Bhargava

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    • Antagonism in fungi as a measure of control in ‘Red-leg’ disease of lettuce

      R P Asthana

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      1. A number of fungi have been tested with respect to their repressing effect on the germination, growth and parasitic vigour ofBotrytis cinerea. The most active fungi in these respects were:Penicillium chrysogenum, Eidamia viridescens, Trichoderma lignorum andPhoma sp., the two last particularly.

      2. The same effect is produced by filtrates of the medium in which these fungi have grown, thus suggesting that the action is due to staling products.

    • The deccan traps

      L Rama Rao

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      After recapitulating some of the main facts about the Deccan traps which have been definitely established, and drawing attention to the connection between this igneous activity and the disruption of the Gondwana continent, a new interpretation of the geological history of the Deccan trap period has been put forward on lines which it is expected may ultimately lead to a satisfactory solution of the many knotty problems connected with this great volcanic rock-formation. The relationship between the main mass of the Deccan trap and its two important outliers one near Rajahmundry and the other in Western Sind is next considered. The problem of the age of the Deccan traps is discussed on the basis of all the evidence available in the different areas, from which it would appear that the eruptions began at the close of the cretaceous, and continued not only throughout the eocene but extended even into later periods.

    • Genic analysis of rice - I. Grain shedding

      B S Kadam

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      The local wild rice, which sheds its grain completely, was crossed with a Burmese variety,Paungbalaung 3, which is a non-shedder. The character of the wild rice is completely dominant and is caused by two duplicate genes Sh1 and Sh2.

    • On two collections of the ophidian genus,Cylindrophis Wagler

      Beni Charan Mahendra

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      The present study shows that the distinctive features, generally recognised between the three species ofCylindrophis Wagler, under consideration, do not stand the test of a thorough and intensive scrutiny of a representative collection. The species appear to be valid, but our ideas about their differences have to be modified. A new key for this genus, proposed by Dr. Malcolm A. Smith, is given and it is hoped that the key will stand the test of further scrutiny.

    • Three new species ofZygnema from Northern India

      M S Randhawa

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    • A note on some attached forms ofSpirogyra from the Punjab

      M S Randhawa

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    • Contributions to the bionomics, anatomy, reproduction and development of the Indian house-gecko,Hemidactylus flaviviridis RÜPpel. Part I

      Beni Charan Mahendra

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      The present paper is the introductory part of a series of studies made on the habits, anatomy and life-history of the Indian house-gecko,Hemidactylus flaviviridis Rüel. The more important points dealt with herein are as follows :

      1. The systematic position of this lizard is reviewed, and the generally recognised definition of theSquamata criticised in the light of the more recent anatomical work.

      2. The history of the institution of the genusHemidactylus and the speciesH. flaviviridis is concisely dealt with.

      3. A résumé of our knowledge of fossil lacertilians and Gekkonids is given.

      4. A suitable cage devised for the keeping and rearing of geckoes has been described, and the method of incubating the eggs also dealt with.

      5. An account of its general habits, food and feeding, sloughing, fidelity to particular sites in the house, caudal autotomy, regeneration, hibernation, age, etc., is given.

      6. The breeding season is observed to commence generally in March and to continue for several months.

      7. External differences between the two sexes are noted. It is found that two swellings on the ventral aspect of the tail make their appearance in the male during the breeding season.

      8. The method of courtship and copulation has been described.

      9. Observations are made on the size and nature of eggs, their fertilisation, intra-uterine development, incubation, hatching and many other related questions.

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