Akram 1988. On the systematics of the subfamily Procamallaninae Yeh 1960. Part 2. Erection of two new and redescription of two known species of the genus Spirocamallanus (Olsen, 1952) Petter, 1979 along with notes on the genera Onchocamallanus Petter, 1979 and Malayocamallanus Jothy and Fernando, 1971 (Nemadtoda[Nematoda], Camallanidae). Karachi University Journal of Science, 17(1-2) 1988: 125-150