成虫的唇瓣 oo.o .Ascaris, the three 0 lips are seen at the a anterior end. The margin of each lip is lined with minute teeth which are not。 visible at this magnification.×5 Enlarged by 23. 4.成虫的唇瓣 •Ascaris, the three lips are seen at the anterior end. The margin of each lip is lined with minute teeth which are not visible at this magnification. ×5. Enlarged by 23.4