Role of the fungus--Periconiella sp. in destruction of biomedical waste.

The disposal of biomedical waste is a burning problem in developing countries due to scarcity of resources and funds in view of its high cost involved. In this paper, a very cheap, easily available and effective method by using fungus--Periconiella sp. isolated from cow dung was successfully tried, which degrades the biomedical waste materials very efficiently and quickly without leaving any trace of harmful effect on the population.

On the ultrastructural study of brain neurosecretory cells of Hydrophilus olivaceus Fabr. (Polyphaga - Coleoptera).

Ultrastructural studies of neurosecretory cells were made in Hydrophilus olivaceus. Two groups of neurosecretory cells are localized in the dorsum of brain, where one is the median group comprising of 15 neurosecretory cells each and the other consists of two lateral groups comprising of 4 to 6 neurosecretory cells in each. A dual mode of release of neurosecretory products is seen, where one part is released through the axons of the neurosecretory cells and other part directly through the protocerebral region of brain by diffusion.

The male accessory reproductive glands and spermatophore in Hydrophilus olivaceus (Polyphaga-Coleoptera).

1 In Hydrophilus olivaceus two pairs of accessory glands of mesodermal origin are associated with the male reproductive apparatus. The inner pair of glands (AG1) are thin-walled, recurved tubes of uniform diameter. Their histology and histochemistry was described.