A sample of Calcareous Sponge. Wet mount.
33 in stock
C.s. in region of esophagus, selected to show hearts.
C.s For Study of general structure.
Earthworm, Thru Sex Organ, l.s. through sex organs, selected to show seminal receptacles and vesicle...
Horsefly, Mouth Parts - Piercing and sucking mouth parts.