Tullgren funnel
From ZooTerms (Dictionary of Invertebrate Zoology)
Tullgren funnel: Apparatus designed by A. H. Tullgren for extraction of animals from duff and litter; the sample is placed on a sieve and heat is applied from above to drive the animals downward into a funnel with a collecting vessel below; similar to a Baerman funnel that uses a water interface between sample and collecting vessel.
