• Volume 21, Issue 2

      February 1945,   pages  77-127

    • Cytological studies in Bignoniaceæ - Part IV. The cytology ofDolichandrone Rheedii seem and allied genera

      K R Venkatasubban

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      The somatic chromosome numbers have been determined, for the first time for the following species and were found to be as follows:-

        unordered

      From the nucleolar behaviour, the number of prochromosomes attached to the nucleolus in some of the species during prophase and from secondary association studies, it is concluded that the 40-chromosomed species are in the nature of allotetraploids with a basic number of 10.

      Secondary association was observed inDolichandrone Rheedii and from the maximum association, the number 10 was derived as representing the basic number. The meiotic chromosome counts were made in the following species :

        unordered

      The tapetum shows a considerable variation in its behaviour in the different members of the family Bignoniaceæ. InStenolobium stans, it disintegrates even before the pollen mother cells enter upon the meiotic divisions. InPhyllarthron comorense also it begins to disappear at an early stage and no trace of it seen after the tetrad stage. In others likeDoli- chandrone Rheedii andParmentiera edulis, the tapetum is of the intrusive type and its cells may protrude inwards to such an extent as to partition the anther loculus. A plasmodial type of tapetum is met with inParmentiera edulis.

    • The natural occurrence of ergot in South India

      K M Thomas T S Ramakrishnan K V Srinivasan

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      A survey was conducted on the upper slopes of the Nilgiri plateau, the Pulneys (in the neighbourhood of Kodaikanal), Wynaad (Malabar and Nilgiris) and portions of Anamalais to find out if any indigenous ergots are present.Claviceps was observed on 18 species of grasses. All of these except three are new records. On twelve of these both the sphacelial and sclerotial stages were observed. On the rest the sphacelial stage alone was present.

      The fungi collected could be tentatively differentiated into five groups from the conidial characters. One of these appears to beClaviceps purpurea.

    • Studies on a variant ofTrypanosoma evansi in a buffalo

      S V Mudaliar

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      A small trypanosome was met with in the blood of a buffalo and its morphology differed widely from that of the usual type ofT. evansi. A biological study of the organism was made on small laboratory and large animals, which also indicated that the trypanosome was different fromT. evansi. It is considered that the organism studied is a variant ofT. evansi if not an entirely new one, and the author has named itT. evansi var.rayi, after Dr. H. N. Ray.

    • Some aspects of spontaneous subarachnoid hæmorrhage

      B K Ramakrishna Rao

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      1. Ten cases of subarachnoid hæmorrhage are reported.

      2. The ætiology, pathology, symptoms, diagnosis and treatment are outlined.

      3. The characteristic C.S.F. findings and the indications for lumbar puncture are discussed.

      4. The importance of ophthalmoscopic examination has been stressed.

    • On two new Hæmoproteids of Indian birds

      S L Zargar

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      Twenty-one birds including fifteen of different species have been studied and Hæmoproteus infection has been registered in three birds, in two of which the parasite has been recorded for the first time.

      1. Family.—Hæmoproteidæ.Genus.—Hæmoproteus.Species.—Hæmoproteus meropi, n.sp.Hosts.—Merops orientalis (green bee eater).Locality.—Area of Government Poultry Farm, Telinkery, Nagpur, C.P., India.

      2. Family.—Hæmoproteidæ.Genus.—Hæmoproteus.Species.—Hæmoproteus xantholæmi, n.sp.Hosts.—Xantholcema hcemacephala (Indian crimson breasted barbet Syn. Copper smith).Locality.—Reserve forest, Telinkhery, Nagpur, C.P., India.

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