Volume 68, Issue 2
August 1968, pages 59-110
pp 59-68 August 1968
The collection of brachiopod larvae from the Arabian Sea off Karwar was found to consist of three different types belonging toDiscinisca sp.,Pelagodiscus atlanticus (King) andLingula sp. The larvae designated as those ofDiscinisca sp. are very characteristic in having two pairs of long, straight, stiff and brittle spines and are perhaps being described for the first time. Developmental stages ofP. atlanticus, younger than so far known, are represented in this collection. The third and the most numerous type belongs to a species ofLingula. The probable significance of the time of origin of the peduncle and the attainment of the linear shape inLingula sp. is discussed. Notes on the breeding seasons of the latter two types are also added.
pp 69-78 August 1968
Experiments on olfactory perception and on conditioned responses for gustatory and visual stimuli were carried out in the case of fingerlings of the milk fishChanos chanos. Experiments tend to indicate the presence of olfactory perception. Gustatory and visual perceptions appear to be well developed. Fingerlings could recognize white, red and green lights with equal acuteness.
pp 79-90 August 1968
The feeding behaviour of Hoopoe is peculiar. It captures its insect food by “gaping”. During this operation the bill is first kept closed, then it is driven into the ground. Later the bill is opened against the resistance of earth and the insect food is captured. A study of the functional anatomy of the feeding apparatus of the bird was undertaken to find out the advantageous modifications of skull and the different sets of the muscles which open and close the jaws. The main emphasis was given on the myology of the feeding apparatus. The development of muscles, nature of muscles, their origins and insertions were studied in considerable details. Along with the jaw muscles, tongue muscles and the role of tongue was also studied.
pp 91-110 August 1968
The authors have recorded several parasites of paddy stem-borers in India, some of which were not known previously from this country while many others were known earlier only from other hosts. Some species of parasites recorded here are new to science.
The new records mentioned include,Goniozus indicus andPerisierola sp. (Hym.: Bethylidae);Elasmus sp. andE. albopictus (Hym.: Elasmidæ);Tetrastichus ayyari (Hym.: Eulophidae); ?Dicopulus sp. (Hym.: Mymaridae); Gen. nr.Habrocytus (Hym.: Pteromalidae);Trichogramma japonicum, T. sp. (notminutum),Trichogramma sp. (Hym.: Trichogrammatidae);Chelonus sp. 1,Chelonus sp. 2,Meteorus ? unicolor, Orgilus sp.,Rhaconotus schoenobivorus, R. signipennis (Hym.: Braconidae);Amauromorpha accepta accepta, A. ? metathoracica, Apsilops sp.,Isotima sp., Gen.et sp. indet. (Phaeogenini), Gen.et sp. indet. (Pimplini),Temelucha pestifer, T. sp. nr.pestifer, Temelucha sp. 1 andTemelucha sp. 2 (Hym.: Ichneumonidæ);Telenomus dignus, T. rowani, T. sp. nr.rowani andT. (Aholcus) sp. (Hym.: Scelionidae) onTryporyza incertulas; Trichospilus diatraeae (Hym.: Eulophidae),Apanteles pallipes andTropobracon schoenobii (Hym.: Eulophidae),Apanteles pallipes andTropobracon schoenobii (Hym.: Braconidae);Anilastus sp., Gen.et sp. indet. (Campoplegini),Coccygomimus laothoë andDevorgilla sp. (Hym.: Ichneumonidae) onSesamia inferens; Apanteles baoris, R. signipennis andT. schoenobii (Hym.: Braconidae);A. a. schoenobii, Centeterus alternecoloratus var.?, Gen.et sp. indet. (Pimplinae),Pristomerus sp. andTemelucha sp. nr.basimacula (Hym.: Ichneumonidae) onChilotraea auricilia; Apanteles flavipes andT. schoenobii (Hym.: Braconidae) onChilotraea polychrysa andApanteles sp. (group F) andR. schoenobivorus (Hym.: Braconidae) onChilo suppressalis.
New records of nematode parasites were:Agamermis sp. onT. incertulas, 5 new species ofHexamermis onT. incertulas and unidentified nematode species onC. auricilia, C. partellus, C. suppressalis andS. inferens.