Volume 73, Issue 1
January 1971, pages 1-49
pp 1- January 1971
pp 1-3 January 1971
Clinostomoides chauhani n. sp. a metacercaria is described from the body cavity of a freshwater fishHeteropneustes fossilis (Bloch). The species is characterised by a spinose cuticle, by position of gonads and by simple uterus.
pp 4-7 January 1971
The oxygen uptake rates in temperature of acclimation at 20 and 35° C. were higher and lower respectively than when transferred to these two temperatures from 35° and 20° C. respectively.
pp 8-14 January 1971
A new species of colonial rotifer belonging to the genusConochilus has been found to occur in an astatic pool in Madurai. It is a spherical colony of about a thousand individuals arranged radially along the periphery. The interior of the colony consists of a very extensive, dichotomously branching network of flattened, gelatinous tubes to which the individual zooids are attached. Based on this arborescent system of tubes, the nameC. arboreus is proposed for the species. A key for all the known species under this genus is also given.
pp 15-19 January 1971
1. The morphology of the branchio-cephalic venous system of two Teleostean fishes has been described.
2. InClarias batrachus paired anterior cardinals, formed by the union of external and internal jugulars, pour the venous blood into ducti cuveri. Veins from the arborescent organs also join the anterior cardinals of their respective side.
3. There are two right and left inferior jugulars which join to form a common inferior jugular which opens into the right ductus cuveri.
4. InTor tor, the external and internal jugulars form the paired anterior cardinals on each side which ultimately join with the ducti cuveri.
5. Only a single inferior jugular has been observed which opens into the right ductus cuveri.
pp 20-29 January 1971
The paper deals with four species of nematodes and two of acanthocephala, all collected from vertebrate hosts from Great Nicobar.
pp 30-35 January 1971
A virus disease of bittergourd (Momordica charantia L.) was observed around Coimbatore. The virus was transmitted by five species of aphid vectors,viz., Myzus persicae, Aphis gossypii, A. malvae A. nerii andBrevicoryne brassicae but not by sap or seed. The virus did not pass on toSolanum tuberosum L. andCitrus aurantifolia. The host range of the virus was confined to members of Cucurbitaceae. The virus was tentatively designated as Bittergourd Mosaic Virus.
pp 36-42 January 1971
Reaction of tetragonal hen egg-white lysozyme with excess iodine in potassium iodide in 0·02M acetate buffer at pH 4·7 gave the heavy atom derivative : iodolysozyme which has been crystallized in the same form.
Tryptic digestion of heat denatured iodolysozyme and paper electrophoresis, at pH 3·6 and pH 6·4 of the digest have shown that only the single histidine in lysozyme is iodinated. This location by chemical means, of the particular amino-acid residues attacked by I+ in lysozyme, is in disagreement with the crystallographic location by Blake who has investigated the reaction of tetragonal lysozyme with iodine crystallographically.
Iodolysozyme was found to be about 80 per cent biologically active against the cell-walls ofMicrococcus lysodeikticus.
pp 43-49 January 1971
1. Inseminated females specimens of the tropical vespertilionid bat,Pipistrellus ceylonicus chrysothrix, were kept isolated from the males for varying lengths of time during the months of June and July in 1968 and 1969.
2. Every female isolated after the second week of June had undergone copulation. Ovulation and fertilization had not occurred until the 10th of July.
3. Sperms introduced on or before 25th June did survive inside the genital tract of the females and successfully fertilized the ova released during the second week of July.
4. On circumstantial evidence it is concluded that presumably in all the females of this species copulation occurs during the first week of June, and the inseminated sperms are able to survive inside the genital tract of the female and fertilize the ova released some five weeks later in July.