PLATE XL VII. 



Figs. 1-4.— GROMIA TERRICOLA, 



Fig. 1. Individual with a multitude of extended pseudopodal rays forming an intricate net. The 

 body of the animal has attached posteriorly a quantity of sand and dirt. From among moist moss, in 

 company with Rotifers, &c, in crevices of the pavement in the yard of my house, Philadelphia, June, 

 1874. 200 diameters. 



Fig. 2. A second individual found in company with the former. 



Fig. 3. A third individual with few pseudopodal extensions. Also found with the preceding. 

 The arrows indicate the course of currents of the protoplasm. 200 diameters. 



Fig. 4. Portion of the pseudopodal rays of a Gromia more highly magnified than in the preceding. 

 The arrows indicate the course of flow of currents of the protoplasm with granules. As seen under 

 Hartnack's No. 11 immersion objective lens. 



FIGS. 5-12.— BIOMYXA VAGAXS. 2.iu diameters. 



FlGS. 5, C, 7. Three successive views of the same individual. 



Figs. 6, 9. Two successive views of another individual. 



Fig. 10. A third individual. This and the preceding specimens, from sphagnum collected at 

 Absecom, X. J., in the autumn and preserved iu a glass case during the winter. March, 1875. 



Figs. 11, 12. Two views of an individual, exhibiting successive changes of form. From Sphag- 

 num. Broad Mountain, Pennsylvania, September, 1876. 



