Volume 78, Issue 1
July 1973, pages 1-44
pp 1-9 July 1973
Three new species are described in this paper. All the species were collected from Kaira and Ahmedabad Districts of Gujarat State. The new species belong to three different genera contained in the family Clubionidae. The genusCastianeira Keyserling is being recorded for the first time from India. Characters and synonyms of this genus is also given.
pp 10-16 July 1973
An analysis of intraspecific variations in more important forage grasses of Western India, belonging to the generaDichanthium, Ischaemum, Chrysopogon, Sehima, Iseilema andHeteropogon of the tribeAndropogoneae has been presented. Under the above six genera 23 species were examined which resulted in isolation of 95 biotypes.
pp 17-21 July 1973
Apostasia, one of the 3 genera of the interesting family Apostasiaceae, has altogether 4 species, but two of themA. parvula Schltr. andA. nipponica Masamune are of very limited distribution, the former being confined to certain parts of Borneo, and the latter being, endemic to Ryukyus. Of the two remaining species,A. wallichii R. Br. was studied by the present author earlier (Rao, 1969). This paper deals with the floral vasculature ofA. odorata Bl., and makes a comparison with that ofA. wallichii. Except for the fact that two of the petal traces bear the traces for the functional stamens, the former are unbranched. The overlapping margins of both sepals and petals are supplied by branching lateral traces of the sepal strands. There is a staminode which gets its vascular supply as a branch from one of the sepal traces. The androecium is represented by two functional stamens and a staminode. The latter belongs to the outer whorl while the stamens belong to the inner whorl of the androecium.
pp 22-29 July 1973
X-ray studies, optical studies and chemical composition of pyrrhotite indicate that in the Ingaladhal copper mine it occurs in both hexagonal and monoclinic modifications as well as in transitional forms. The monoclinic phase might have formed by inversion from the hexagonal phase. The hexagonal form has a composition that appropriates to solvus temperatures of < 300°–360°C. Heated monoclinic and hexagonal monoclinic mixtures of pyrrhotite yielded temperatures ranging from 425°–460°C. From the questionable validity of the pyrrhotite geothermometer it is concluded that the temperature estimates based on the pyrrhotite solvus cannot be used to know the temperature of formation of pyritepyrrhotite assemblage in the Ingaladhal sulphide lode.
pp 30-36 July 1973
A new species of frog,Philautus shillongensis is described from Meghalaya and is compared with allied species includingP. cherrapunjiae, (Roonwal and Kripalani, 1961), the adults of which are unknown.
pp 37-44 July 1973
InCalotes versicolor, splenic primordium appears at stage 30 as a protuberance of mesenchymal cells from the dorsal mesentery. Lymphopoiesis is initiated at stage 40, followed by an increase in the lymphoid population of the rudiment during the successive stages of development. In the adult, splenic pulp is poorly demarcated into white pulp and red pulp. The former is in the form of closely arranged lymphoid follicles and the latter is highly restricted to narrow strands of blood spaces. A comparative study on the lymphoid organization of the spleen of a few other species of reptiles was also carried out.