Volume 58, Issue 4
October 1963, pages 187-247
pp 187-197 October 1963
1. The paper provides a systematic list of sixty species of fishes collected from different aquatic habitats of Poona City and the vicinity localities.
2. About twenty-five species belonging to thirteen different genera are recorded for the first time from this region.
3. A map of Poona is included and the collecting localities are designated.
4. A comprehensive list of fishes recorded by previous workers is also furnished for ready reference.
5. Brief notes on the habitats of each species is given.
pp 198-200 October 1963
pp 201-206 October 1963
Studies in cellular slime moulds from Indian soils - II. On the occurrence of an aberrant strain ofPolysphondylium violaceum bref., with a discussion on the relevance of mode of branching of the sorocarp as a criterion for classifying members of dictyosteliaceae
An aberrant strain ofPolysphondylium violaceum Bref. showing irregular branching is described. The need for re-evaluating mode of branching of the sorocarp as a criterion for classifying genera of Dictyosteliaceae has been discussed.
pp 207-214 October 1963
Starvation stress is reflected in changes in thermal response but the differences in oxygen consumption are not pronounced.
On the first day of the experiment the Q10 values decrease with increasing weight but increase with increasing temperature at all temperatures studied. On the fourteenth and the twenty-first day of starvation Q10 values increase with increasing body weight between 25° and 30° C. but between 30° and 35° C. decrease with size.
Theb values on the fourteenth day of starvation are intermediate between surface area dependence and weight dependence at all temperatures (0·87, 0·98 and 0·86) and surface area dependent on the twenty-first day of the experiment at all temperatures (0·67, 0·57 and 0·61).
The decrease in weight is progressive but negligible.
pp 215-223 October 1963
The detailed structure of the ommatidium of the compound eye ofCaridina laevis shows that it has a tetragonal pattern of arrangement. Judged from the number of nuclei, distal retinal pigment cells are two, always placed against one angle of the cone. Around the rhabdome, seven proximal retinular cells, one rudimentary retinular cell and a tapetal cell, have been noticed. The relative position of the ommatidial pigments in the dark- and light-adapted eyes is shown.
The statocyst is of an extremely degenerate type, the homology of which is inferred from its relative position. The tactile hairs in the vicinity of the statocyst with the entangled debris might function as a static organ. The eyes also are shown to help the animal in orientation and equilibration.
pp 224-234 October 1963
pp 235-247 October 1963
Ostrincola portonoviensis Reddiah,Conchyliurus fragilis Reddiah andC. bombasticus Reddiah are redescribed. Certain defects in the original description are rectified. A single specimen ofHemicyclops, apparently belonging to a new species, is described without a specific name.