THE FAMILY GEOMIID^ 69 



Section A. — Geneea in which the Apeeture is Single 



AND Terminal. 



LieberhieJinia, Claparede and Lachmann. 



Test rather large, ovate or pyriform, with the 

 mouth in a depression at the middle of the broad 

 end, w4iich is more or less four-lobed. Circulation of 

 protoplasmic granules rapid. 



Example. — L. Wageneri, Clap. andLachm., • Mem. 

 Inst. Nat. Genevois,' vol. xvi. 1859, p. 465, pi. xxiv. 

 Habitat, fresh-water ponds in Germany. (Plate 1, 

 fig. A.) 



Mil-rogromia, R. Hertwig. 



Test minute, ovate ; somewhat bilateral, owing to 

 the one-sided position of the produced collar-like 

 mouth. Cavity of the test only partially tilled. 

 Pseudopodia given off from an oral column. Often 

 found in colonies. 



Example. — M. socialis, Archer sp. (Gromia socia- 

 lis), Archer, ' Quart. Journ. Micr. Sci.' N.S., vol. ix. 

 1869, p. 27, pi. XX. figs. 7-11. See also ' Ueber If //vro- 

 groniia,' by R. Hertwig, 'Arch. Mikr. Anat.' vol. x. 

 1874, supplement, vol. i. Habitat, fresh water. 

 Diameter of separate tests, "015 to -025 mm. (Plate 1, 

 fig. B.) 



Gromia, Dujardin. 



Test large, ovate or rounded, symmetrical in form, 

 flexible. Mouth terminal ; pseudopodia much reticu- 

 lated. Possessing one or more nuclei ; contractile 

 vacuole often wanting. 



