MICROGROMIA MUCICOLA.. 133 



minuteness it has probably been overlooked by other 

 observers. The method of multiplication has not been 

 observed. 



Genus 46. LIEBERKUEHNIA* Claparede & Lach- 

 mann, 1859. 



Lieberkuehnia CLAPAREDE & LACHMANN Etude Inf. et Rhiz. 



I, 2 (1859), pp. 464-465. 

 Lieberkiihnia HAECKEL Rhiz. fin. et ord. (1861), p. 13. 



Test membranous, supple, smooth or thinly covered 

 with foreign particles, pyriform, ovoid, or spherical ; 

 aperture usually single, lateral or sub-terminal, flexible ; 

 nuclei one or more ; contractile vesicles numerous ; 

 pseudopodia arising from a long peduncle within the 

 test, reticulate, often enveloping the test. 



This genus was formed by Claparede & Lachmann 

 to include those Rhizopoda which possess anatomosing 

 pseudopodia arising from an internal peduncle or pro- 

 longation of the plasma and a test which is supple and 

 membranous. Two species included in this genus are 

 exclusively marine, one (L. paludosa) is exclusively a 

 freshwater form, whilst L. wageneri is found in both 

 salt- and fresh-water ; that only has been recorded 

 from the British Isles. 



In the AllogromiinBe the aperture is usually well 

 marked and readily identified, but in Lieberkuehnia it 

 is often obscure and difficult to locate, especially when 

 the animal is in a nearly spherical form ; the aperture 

 then usually is merely a narrow slit in the test. The 

 origin of the pseudopodia is also obscure when they are 

 emitted from various parts of the layer of plasma which 

 often more or less completely envelopes the exterior of 

 the test. Individuals having two apertures, one at 

 each pole of the test, sometimes occur. 



* This spelling is correct in accordance with Latin orthography. The 

 German modified ii cannot be used in the names of either genera or 

 species. 



