Ascaris megalocephala, roundworm of horses, t.s. of adult female in region of sex organs

Ascaris megalocephala, t.s. of adult male in region of sex organs

Ascaris megalocephala, t.s. in region of oesophagus showing the triradiate lumen

Ascaris megalocephala embryology. Sec. of uteri showing entrance and modification of sperm in ova

Ascaris megalocephala embryology. Sec. of uteri showing maturation stages (meiosis). Polar bodies can be seen.

Ascaris megalocephala embryology. Sec. of uteri showing ova with male and female pronuclei

Ascaris megalocephala embryology. Sec. of uteri showing early cleavage stages (mitosis)

Ascaris megalocephala embryology. Sec. of uteri showing later cleavage stages (mitosis)

Rhabditis, a nematode living in earthworms, w.m. of ova showing cleavage stages

Ascaris lumbricoides, roundworm of man, t.s. of adult female in region of gonads

Ascaris lumbricoides, t.s. of male and female in region of gonads

Ascaris lumbricoides, t.s. in region of oesophagus

Ascaris lumbricoides, t.s. of adult male in region of gonads

Ascaris lumbricoides, infertile ova w.m.

Ascaris lumbricoides, ova in faeces w.m.

Ascaris lumbricoides, larvae in sec. of pig lung

Ascaris lumbricoides, isolated muscle cells w.m.

Enterobius vermicularis, w.m. of adult male *

Enterobius vermicularis, w.m. of adult female

Enterobius vermicularis (Oxyuris), pin worm, w.m. of an adult specimen (male or female, our selection)

Enterobius vermicularis, sec. through human appendix with parasites in situ

Enterobius vermicularis, ova from faeces w.m.

Strongyloides, filariform larvae w.m. (infective larvae) *

Strongyloides, sec. through host intestine with parasites

Strongylus sp., lung worm, infected lung, sec.